WO2012133929A1

WO2012133929A1 - Method for producing the transition metal ion complex, catalyst for trimerization, and method for producing 1-hexene

Info

Publication number: WO2012133929A1
Application number: PCT/JP2012/059287
Authority: WO
Inventors: Taichi Senda; Masaya Tanimoto
Original assignee: Sumitomo Chemical Co Ltd
Current assignee: Sumitomo Chemical Co Ltd
Priority date: 2011-03-29
Filing date: 2012-03-29
Publication date: 2012-10-04
Anticipated expiration: 2013-09-29
Also published as: JP2012214460A

Abstract

An object of the present invention is to provide a silicon-bridged Cp-Ar transition metal complex that serves as a catalytic component capable of efficiently and highly selectively producing 1-hexene through the trimerization reaction of ethylene. The present invention provides a transition metal ion complex represented by any of formulae (1-1) to (1-3), etc.: wherein M represents a transition metal atom of Group 4 of the Periodic Table of the Elements; A represents a counter anion; R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, R²¹, X¹ and X²each independently represent a hydrogen atom or the like; R¹⁰ and R¹¹ each independently represent a hydrogen atom or the like.

Description

DESCRIPTION

METHOD FOR PRODUCING THE TRANSITION METAL ION COMPLEX, CATALYST FOR TRJMERIZATION, AND METHOD FOR PRODUCING 1-HEXENE

[Technical Field]

[0001]

The present invention relates to a transition metal ion complex, a method for producing the transition metal ion complex, a catalyst for trimerization, and a method for producing 1-hexene.

[Background Art]

[0002]

An a-olefin is an industrially important raw material monomer that is produced by the oligomerization of ethylene using a metal catalyst. However, the oligomerization of ethylene usually gives α-olefin mixtures according to Schulz-Flory distribution. Therefore, the development of a catalyst system capable of selectively producing one kind of α-olefin is very important industrially.

[0003]

For example, Patent Document 1 has reported that a half-metallocene titanium complex represented by formula (Cp-B(R)_nAr)TiR¹3 activated with an activating co-catalyst component works as a catalyst for selective trimerization of ethylene.

Among these catalysts for selective ethylene trimerization, a half-metallocene titanium complex (carbon-bridged Cp-Ar complex) comprising cyclopentadiene bonded to a substituted aryl group via a carbon atom, such as [l-(l-methyl-l-(3,5-dimethylphenyl)ethyl)-3- trimethyIsilylcyclopentadienyl]titanium trichloride, has been reported to work as an efficient catalyst for ethylene trimerization under conditions of 30°C with MAO (methylaluminoxane) as an activating co-catalyst component (see e.g., Non-Patent Document 1). On the other hand, [dimethylphenylsilylcyclopentadienyl]titanium trichloride, which is a half-metallocene titanium complex (silicon-bridged Cp-Ar complex) comprising cyclopentadiene bonded to a substituted aryl group via a silicon atom, has been reported to have low catalytic activity in ethylene trimerization reaction under the same conditions as above and to also have low 1-hexene selectivity (see Non-Patent Document 1).

[0004] Moreover, it has been reported that a catalyst system for ethylene trimerization comprising a carbon-bridged Cp-Ar complex and MAO exhibits much lower catalytic activity in 1-hexene production and 1-hexene production selectivity under high temperature conditions of 80°C than at 30°C (see Non-Patent Document 2).

[0005]

Use of the carbon-bridged Cp-Ar complex as a catalyst precursor in ethylene trimerization reaction usually requires activating the half-metallocene titanium trichloride complex with a large excess of an activating co-catalyst component such as MAO (see Patent Document 1 and Non-Patent Document 1). On the other hand, it has been reported that catalytic activity in ethylene trimerization is improved by using, in ethylene trimerization reaction, an ion complex formed by activating a half-metallocene titanium trimethyl complex as a catalyst precursor with a small excess of ammonium borate, compared with activating the corresponding trichloride complex as a catalyst precursor. In the description therein, however, this approach also requires using an excess of MAO as an impurity scavenger (see Non-Patent Documents 3 and 4).

[Prior Art]

[Patent Document]

[0006]

[Patent Document 1] JP-A-2004-524959

[Non-Patent Document]

[0007]

[Non-Patent Document 1 ] Organometallics 2002, 21 , 5122-5135.

[Non-Patent Document 2] Chinese Journal of Chemistry 2006, 24, 1397-1401.

[Non-Patent Document 3] J. Am. Chem. Soc. 2009, 131, 5298-5312.

[Non-Patent Document 4] J. Mol. Catal. A: Chem. 2006, 248, 237-247.

[Summary of the Invention]

[Problem to be Solved by the Invention]

[0008]

Under such circumstances, an object of the present invention is to provide a transition metal ion complex that serves as a catalyst capable of efficiently and highly selectively producing 1-hexene through the trimerization reaction of ethylene. [Means for Solving the Problem]

[0009]

Specifically, the 1 st aspect of the present invention relates to a transition metal ion complex represented by formula (1-1), (1-2) or (1-3):

wherein

M represents a transition metal atom of Group 4 of the Periodic Table of the Elements; A represents a counter anion;

R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, R²¹, X¹ and X² each independently represent

a hydrogen atom, a halogen atom,

an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an alkoxy group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an aryl group having 6 to 20 carbon atoms which may have a halogen atom as a substituent, an aryloxy group having 6 to 20 carbon atoms which may have a halogen atom as a substituent, an aralkyl group having 7 to 20 carbon atoms which may have a halogen atom as a substituent, an aralkyloxy group having 7 to 20 carbon atoms which may have a halogen atom as a substituent,

00

a substituted silyl group represented by -Si(R )₃, wherein the three R moieties each independently represent a hydrogen atom, a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the three R²² moieties is 1 to 20, or a disubstituted amino group represented by -N(R²³)₂, wherein the two R²³ moieties each independently represent a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the two R²³ moieties is 2 to 20, and

at least one of R¹, R², R³ and R⁴ is a halogen atom, the alkyl group, the alkoxy group, the aryl group, the aryloxy group, the aralkyl group, the aralkyloxy group, the substituted silyl group or the disubstituted amino group;

R¹⁰ and Rⁿ each independently represent

a hydrogen atom, a halogen atom,

an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an alkoxy group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an aryloxy group having 6 to 20 carbon atoms which may have a halogen atom as a substituent, an aralkyl group having 7 to 20 carbon atoms which may have a halogen atom as a substituent, an aralkyloxy group having 7 to 20 carbon atoms which may have a halogen atom as a substituent,

a substituted silyl group represented by -Si(R²²)₃, wherein the three R²² moieties each independently represent a hydrogen atom, a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the three R²² moieties is 1 to 20, or a disubstituted amino group represented by -N(R ³)₂, wherein the two R²³ moieties each independently represent a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the two R²³ moieties is 2 to 20; or

of R¹, R², R³ and R⁴, two group bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the two carbon atoms to which the two groups are bonded, of R⁵, R⁶, R⁷, R⁸ and R⁹, two group bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the two carbon atoms to which the two groups are bonded, of R¹², R¹³, R¹⁴, R¹⁵ and R¹⁶, two group bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the two carbon atoms to which the two groups are bonded, of R¹⁷, R¹⁸, R¹⁹, R²⁰ and R²¹, two group bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the two carbon atoms to which the two groups are bonded, and R¹⁰ and R¹¹ may be bonded to each other to form a ring together with the silicon atom to which R¹⁰ and R¹¹ are bonded.

[0010]

Moreover, the 2nd aspect of the present invention relates to methods for producing the transition metal ion complex represented by formula (1-1), the transition metal ion complex represented by formula (1-2), and the transition metal ion complex represented by formula (1-3).

[0011]

Furthermore, the 3rd aspect of the present invention relates to a catalyst for trimerization comprising the transition metal ion complex.

[0012]

Furthermore, the 4th aspect of the present invention relates to a method for producing 1-hexene, comprising trimerizing ethylene in the presence of the catalyst for trimerization. [Advantages of the Invention]

[0013]

The present invention can provide a transition metal ion complex that is suitable as a catalyst capable of efficiently and highly selectively producing 1-hexene through the trimerization reaction of ethylene even under high temperature conditions. The present invention can also provide a method for producing 1-hexene that does not require using an expensive activating co-catalyst component such as MAO.

[Embodiments for Carrying Out the Invention]

[0014]

In the present invention, the term "substituent" encompasses a halogen atom constituting a compound or a group.

[0015]

Hereinafter, the transition metal ion complex represented by formula (1-1), (1-2) or (1-3) (hereinafter, abbreviated to a "transition metal ion complex (1-1)", etc.) will be described in detail.

In the transition metal ion complexes (1-1), (1-2) and (1-3), M represents an element of Group 4 of the Periodic Table of the Elements, and examples thereof include titanium, zirconium and hafnium atoms. Among them, a titanium atom is preferable.

[0016]

In the transition metal ion complexes (1-1), (1-2) and (1-3), the substituents R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, R²¹, X¹ and X² are as defined above, and specific examples thereof are shown below.

[0017]

The halogen atom is a fluorine, chlorine, bromine or iodine atom and is preferably a chlorine atom.

[0018]

Examples of the "alkyl group having 1 to 20 carbon atoms" in the alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, n-pentyl, neopentyl, amyl, n-hexyl, heptyl, n-octyl, n-nonyl, n-decyl, n-dodecyl, n-tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl and n-eicosyl groups. Of them, a preferable alkyl group is an alkyl group having 1 to 10 carbon atoms, and more preferable examples thereof can include methyl, ethyl, isopropyl, tert-butyl and amyl groups. Moreover, the phrase "may have a halogen atom as a substituent" in the "alkyl group which may have a halogen atom as a substituent" means that some or all hydrogen atoms in the alkyl group may be substituted by a halogen atom. Specific examples of the halogen atom are as described above. When the alkyl group has a halogen atom as a substituent, the number of its carbon atoms is preferably in the range of 1 to 20, more preferably in the range of 1 to 10. Preferable examples of the alkyl group having a halogen atom as a substituent can include fluoromethyl, difluoromethyl, trifluoromethyl, chloromethyl, dichloromethyl, trichloromethyl, bromomethyl, dibromomethyl, tribromomethyl, fluoroethyl, perfluoropropyl, perfluorobutyl, perfluoropentyl and perfluorohexyl groups.

[0019]

Examples of the "aryl group having 6 to 20 carbon atoms" in the aryl group having 6 to 20 carbon atoms which may have a halogen atom as a substituent include phenyl, 2- tolyl, 3-toly , 4-tolyl, 2,3-xylyl, 2,4-xylyl, 2,5-xylyl, 2,6-xylyl, 3,4-xylyl, 3,5-xylyl, 2,3,4- trimethylphenyl, 2,3,5-trimethylphenyl, 2,3,6-trimethylphenyl, 2,4,6-trimethylphenyl, 3,4,5- trimethylphenyl, 2,3,4,5-tetramethylphenyl, 2,3,4,6-tetramethylphenyl, 2,3,5,6- tetramethylphenyl, pentamethylphenyl, ethylphenyl, n-propylphenyl, isopropylphenyl, n- butylphenyl, sec-butylphenyl, tert-butylphenyl, n-pentylphenyl, neopentylphenyl, n-hexylphenyl, n-octylphenyl, n-decylphenyl, n-dodecylphenyl, n-tetradecylphenyl, naphthyl and anthracenyl groups. Of them, a preferable aryl group is an aryl group having 6 to 10 carbon atoms, and more preferable examples thereof can include a phenyl group. Moreover, the phrase "may have a halogen atom as a substituent" in the "aryl group which may have a halogen atom as a substituent" means that some or all hydrogen atoms in the aryl group may be substituted by a halogen atom. Specific examples of the halogen atom are as described above. When the aryl group has a halogen atom as a substituent, the number of its carbon atoms is preferably in the range of 6 to 20, more preferably in the range of 6 to 10. Preferable examples of the aryl group having a halogen atom as a substituent can specifically include fluorophenyl, difluorophenyl, trifluorophenyl, tetrafluorophenyl, pentafluorophenyl, chlorophenyl, bromophenyl and iodophenyl groups.

[0020]

Examples of the "aralkyl group having 7 to 20 carbon atoms" in the aralkyl group having 7 to 20 carbon atoms which may have a halogen atom as a substituent include benzyl, (2- methylphenyl)methyl, (3-methylphenyl)methyl, (4-methylphenyl)methyl, (2,3- dimethylphenyl)methyl, (2,4-dimethylphenyl)methyl, (2,5-dimethylphenyl)methyl, (2,6- dimethylphenyl)methyl, (3,4-dimethylphenyl)methyl, (3,5-dimethylphenyl)methyl, (2,3,4- trimethylphenyl)methyl, (2,3,5-trimethylphenyl)methyl, (2,3,6-trimethylphenyl)methyl, (3,4,5- trimethylphenyl)methyl, (2,4,6-trimethylphenyl)methyl, (2,3,4,5-tetramethylphenyl)methyl, (2, 3 ,4,6-tetramethylphenyl)methyl, (2,3 , 5,6-tetramethylpheny l)methyl,

(pentamethylphenyl)methyl, (ethylphenyl)methyl, (n-propylphenyl)methyl,

(isopropylphenyl)methyl, (n-butylphenyl)methyl, (sec-butylphenyl)methyl, (tert- butylphenyl)methyl, (n-pentylphenyl)methyl, (neopentylphenyl)methyl, (n-hexylphenyl)methyl, (n-octylphenyl)methyl, (n-decylphenyl)methyl, (n-dodecylphenyl)methyl, naphthylmethyl and anthracenyl methyl groups. Of them, a preferable aralkyl group is an aralkyl group having 7 to 10 carbon atoms, and more preferable examples thereof can include a benzyl group. Moreover, the phrase "may have a halogen atom as a substituent" in the "aralkyl group which may have a halogen atom as a substituent" means that some or all hydrogen atoms in the aralkyl group may be substituted by a halogen atom. Specific examples of the halogen atom are as described above. When the aralkyl group has a halogen atom as a substituent, the number of its carbon atoms is preferably in the range of 7 to 20, more preferably in the range of 7 to 10.

[0021]

Examples of the "alkoxy group having 1 to 20 carbon atoms" in the alkoxy group having 1 to 20 carbon atoms which may have a halogen atom as a substituent include methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, sec-butoxy, tert-butoxy, n-pentyloxy, neopentyloxy, n- hexyloxy, n-octyloxy, n-nonyloxy, n-decyloxy, n-undecyloxy, n-dodecyloxy, tridecyloxy, tetradecyloxy, n-pentadecyloxy, hexadecyloxy, heptadecyloxy, octadecyloxy, nonadecyloxy and n-eicosyloxy groups. Of them, a preferable alkoxy group is an alkoxy group having 1 to 10 carbon atoms, and more preferable examples thereof can include methoxy, ethoxy and tert- butoxy groups. Moreover, the phrase "may have a halogen atom as a substituent" in the

"alkoxy group which may have a halogen atom as a substituent" means that some or all hydrogen atoms in the alkoxy group may be substituted by a halogen atom. Specific examples of the halogen atom are as described above. When the alkoxy group has a halogen atom as a substituent, the number of its carbon atoms is preferably in the range of 1 to 20, more preferably in the range of 1 to 10.

[0022]

Examples of the "alkoxy group having 2 to 20 carbon atoms" in the alkoxy group having 2 to 20 carbon atoms which may have a halogen atom as a substituent include ethoxy, n- propoxy, isopropoxy, n-butoxy, sec-butoxy, tert-butoxy, n-pentyloxy, neopentyloxy, n-hexyloxy, n-octyloxy, n-nonyloxy, n-decyloxy, n-undecyloxy, n-dodecyloxy, tridecyloxy, tetradecyloxy, n- pentadecyloxy, hexadecyloxy, heptadecyloxy, octadecyloxy, nonadecyloxy and n-eicosyloxy groups. Of them, a preferable alkoxy group is an alkoxy group having 2 to 10 carbon atoms, and more preferable examples thereof can include ethoxy and tert-butoxy groups. Moreover, the phrase "may have a halogen atom as a substituent" in the "alkoxy group which may have a halogen atom as a substituent" means that some or all hydrogen atoms in the alkoxy group may be substituted by a halogen atom. Specific examples of the halogen atom are as described above. When the alkoxy group has a halogen atom as a substituent, the number of its carbon atoms is preferably in the range of 2 to 20, more preferably in the range of 2 to 10.

[0023]

Examples of the "aryloxy group having 6 to 20 carbon atoms" in the aryloxy group having 6 to 20 carbon atoms which may have a halogen atom as a substituent include phenoxy, 2-methylphenoxy, 3-methylphenoxy, 4-methylphenoxy, 2,3-dimethylphenoxy, 2,4- dimethylphenoxy, 2,5-dimethylphenoxy, 2,6-dimethylphenoxy, 3,4-dimethylphenoxy, 3,5- dimethylphenoxy, 2,3,4-trimethylphenoxy, 2,3,5-trimethylphenoxy, 2,3,6-trimethylphenoxy, 2,4,5-trimethylphenoxy, 2,4,6-trimethylphenoxy, 3,4,5-trimethylphenoxy, 2,3,4,5- tetramethylphenoxy, 2,3,4,6-tetramethylphenoxy, 2,3,5,6-tetramethylphenoxy,

pentamethylphenoxy, ethylphenoxy, n-propylphenoxy, isopropylphenoxy, n-butylphenoxy, sec- butylphenoxy, tert-butylphenoxy, n-hexylphenoxy, n-octylphenoxy, n-decylphenoxy, n- tetradecylphenoxy, naphthoxy and anthracenoxy groups. Of them, a preferable aryloxy group is an aryloxy group having 6 to 10 carbon atoms, and more preferable examples thereof can include phenoxy, 2-methylphenoxy, 3-methylphenoxy and 4-methylphenoxy groups. Moreover, the phrase "may have a halogen atom as a substituent" in the "aryloxy group which may have a halogen atom as a substituent" means that some or all hydrogen atoms in the aryloxy group may be substituted by a halogen atom. Specific examples of the halogen atom are as described above. When the aryloxy group has. a halogen atom as a substituent, the number of its carbon atoms is preferably in the range of 6 to 20, more preferably in the range of 6 to 10.

[0024]

Examples of the "aralkyloxy group having 7 to 20 carbon atoms" in the aralkyloxy group having 7 to 20 carbon atoms which may have a halogen atom as a substituent include benzyloxy, (2-methylphenyl)methoxy, (3-methylphenyl)methoxy, (4- methylphenyl)methoxy, (2,3-dimethylphenyl)methoxy, (2,4-dimethylphenyl)methoxy, (2,5- dimethylphenyl)methoxy, (2,6-dimethylphenyl)methoxy, (3,4-dimethylphenyl)methoxy, (3,5- dimethylphenyl)methoxy, (2, 3 ,4-trimethylphenyl)methoxy, (2,3 , 5-trimethylphenyl)methoxy, (2,3,6-trimethylphenyl)methoxy, (2,4,5-trimethylphenyl)methoxy, (2,4,6- trimethylphenyl)methoxy, (3,4,5-trimethylphenyl)methoxy, (2,3,4,5-tetramethylphenyl)methoxy, (2,3,4, 6-tetramethylphenyl)methoxy, (2, 3 , 5, 6-tetramethy lphenyl)methoxy,

(pentamethylphenyl)methoxy, (ethylphenyl)methoxy, (n-propylphenyl)methoxy,

(isopropylphenyl)methoxy, (n-butylphenyl)methoxy, (sec-butylphenyl)methoxy, (tert- butylphenyl)methoxy, (n-hexylphenyl)methoxy, (n-octylphenyl)methoxy, (n- decylphenyl)methoxy, naphthylmethoxy and anthracenylmethoxy groups. Of them, a preferable aralkyloxy group is an aralkyloxy group having 7 to 10 carbon atoms, and more preferable examples thereof can include a benzyloxy group. Moreover, the phrase "may have a halogen atom as a substituent" in the "aralkyloxy group which may have a halogen atom as a substituent" means that some or all hydrogen atoms in the aralkyloxy group may be substituted by a halogen atom. Examples of the halogen atom are as described above. When the aralkyloxy group has a halogen atom as a substituent, the number of its carbon atoms is preferably in the range of 7 to 20, more preferably in the range of 7 to 10.

[0025]

In the substituted silyl group represented by -Si(R²²)₃, wherein the three R²² moieties each independently represent a hydrogen atom, a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the three R²² moieties is 1 to 20, the R²² moieties are each independently a hydrogen atom; a hydrocarbyl group such as an alkyl group having 1 to 10 carbon atoms (e.g., methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, isobutyl, n-pentyl, n-hexyl, cyclohexyl, n-heptyl, n-octyl, n-nonyl and n-decyl groups) and an aryl group (e.g., a phenyl group); or a halogenated hydrocarbyl group obtained by substituting some or all hydrogen atoms in the hydrocarbyl group by a halogen atom, and the total number of the carbon atoms in the three R²² moieties is in the range of 1 to 20. The total number of the carbon atoms in these three R²² moieties is preferably in the range of 3 to 18. Examples of the substituted silyl group include: monosubstituted silyl groups having one hydrocarbyl or halogenated hydrocarbyl group, such as methylsilyl, ethylsilyl and phenylsilyl groups, and groups obtained by substituting some or all hydrogen atoms in the hydrocarbyl groups of these groups by a halogen atom; disubstituted silyl groups having two hydrocarbyl and/or halogenated hydrocarbyl groups, such as dimethylsilyl, diethylsilyl and diphenylsilyl groups, and groups obtained by substituting some or all hydrogen atoms in the hydrocarbyl groups of these groups by a halogen atom; and trisubstituted silyl group having three

hydrocarbyl and/or halogenated hydrocarbyl groups, such as trimethylsilyl, triethylsilyl, tri-n- propylsilyl, triisopropylsilyl, tri-n-butylsilyl, tri-sec-butylsilyl, tri-tert-butylsilyl, tri-isobutylsilyl, tert-butyl-dimethylsilyl, tri-n-pentylsilyl, tri-n-hexylsilyl, tricyclohexylsilyl and triphenyl silyl groups, and groups obtained by substituting some or all hydrogen atoms in the hydrocarbyl groups of these groups by a halogen atom. Of them, trisubstituted silyl groups are preferable, and trimethylsilyl, tert-butyldimethylsilyl and triphenylsilyl groups, and groups obtained by substituting some or all hydrogen atoms in these groups by a halogen atom are more preferable.

[0026]

In the disubstituted amino group represented by -N(R²³)₂, wherein the two R²³ moieties each independently represent a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the two R²³ moieties is 2 to 20, the R²³ moieties each independently represent a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the two R²³ moieties is in the range of 2 to 20, more preferably in the range of 2 to 10. The hydrocarbyl group and the halogenated hydrocarbyl group are the same as those described as a hydrocarbyl group and a halogenated hydrocarbyl group for the substituted silyl group. Moreover, these two R²³ moieties may be bonded to each other to form a ring together with the nitrogen atom to which R²³ moieties are bonded. Examples of such a disubstituted amino group include dimethylamino, diethylamino, di-n-propylamino,

diisopropylamino, di-n-butylamino, di-sec-butylamino, di-tert-butylamino, di-isobutylamino, tert-butylisopropylamino, di-n-hexylamino, di-n-octylamino, di-n-decylamino, diphenylamino, bistrimethylsilylamino, bis-tert-butyldimethylsilylamino, pyrrolyl, pyrrolidinyl, piperidinyl, carbazolyl, dihydroindolyl and dihydroisoindolyl groups, and groups obtained by substituting some or all hydrogen atoms in these groups by a halogen atom. Of them, dimethylamino, diethylamino, pyrrolidinyl and piperidinyl groups, and groups obtained by substituting some or all hydrogen atoms in these groups by a halogen atom are preferable.

[0027]

Of R¹, R², R³ and R⁴, two groups bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the carbon atoms to which the two groups are bonded, of R⁵, R⁶, R⁷, R⁸ and R⁹, two groups bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the carbon atoms to which the two groups are bonded, of R¹², R¹³, R¹⁴, R¹⁵ and R¹⁶, two group bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the two carbon atoms to which the two groups are bonded, of R¹⁷, R¹⁸, R¹⁹, R²⁰ and R²¹, two group bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the two carbon atoms to which the two groups are bonded, and R¹⁰ and R^u may be bonded to each other to form a ring together with the silicon atom to which R¹⁰ and R¹¹ are bonded. In this context, the ring is a saturated or unsaturated hydrocarbyl ring substituted by a hydrocarbyl group having 1 to 20 carbon atoms, a saturated or unsaturated silahydrocarbyl ring substituted by a hydrocarbyl group having 1 to 20 carbon atoms, etc. Specific examples thereof include cyclopropane, cyclopropene, cyclobutane, cyclobutene, cyclopentane, eyclopentene, cyclohexane, cyclohexene, cycloheptane,

cycloheptene, cyclooctane, cyclooctene, benzene, naphthalene, anthracene, silacyclopropane, silacyclobutane, silacyclopentane and silacyclohexane rings.

[0028]

In the transition metal ion complexes (1-1), (1-2) and (1-3), at least one of R¹, R², R³ and R⁴ is a substituent other than hydrogen, and R¹, R², R³ and R⁴ are each independently preferably a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms or an aralkyl group having 7 to 20 carbon atoms, more preferably an alkyl group having 1 to 20 carbon atoms, even more preferably a methyl group.

[0029]

Examples of R¹, R², R³ and R⁴ include the following substructures represented by sub structural formula (3):

wherein R¹, R², R³ and R⁴ are as defined above:

[0030] methylcyclopentadienyl, ethylcyclopentadienyl, n-propylcyclopentadienyl, isopropylcyclopentadienyl, n-butylcyclopentadienyl, sec-butylcyclopentadienyl, tert- butylcyclopentadienyl, dimethylcyclopentadienyl, trimethylcyclopentadienyl,

tetramethylcyclopentadienyl, phenylcyclopentadienyl, benzylcyclopentadienyl, indenyl, fluorenyl, tetrahydroindenyl, methyltetrahydroindenyl, dimethyltetrahydroindenyl and octahydrofluoreny 1.

[0031]

Of the cyclopentadienyl substructures exemplified above, a preferable cyclopentadienyl substructure is tetramethylcyclopentadienyl, etc.

[0032]

In the transition metal ion complexes (1-1), (1-2) and (1-3), R⁵, R⁶, R⁷, R⁸, R⁹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰ and R²¹ are each independently preferably a hydrogen atom, a halogen atom, an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an aryl group having 6 to 20 carbon atoms which may have a halogen atom as a substituent, an aralkyl group having 7 to 20 carbon atoms which may have a halogen atom as a substituent or a substituted silyl group represented by -Si(R²²)₃, wherein the three R²² moieties each independently represent a hydrogen atom, a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the three R²² moieties is 1 to 20.

[0033]

In the transition metal ion complexes (1-1), (1-2) and (1-3), R⁶, R⁸, R¹³, R¹⁵, R¹⁸ and R²⁰ are each independently preferably an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent or a substituted silyl group represented by -Si(R²²)₃, wherein the three R²² moieties each independently represent a hydrogen atom, a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the three R²² moieties is 1 to 20, more preferably an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent.

[0034]

Examples of a preferable combination of the moieties represented by R⁵, R⁶, R⁷, 8 and R⁹ include the following substructures represented by substructural formula (4):

wherein R⁵, R⁶, R⁷ R⁸ and R⁹ are as defined above:

[0035] phenyl, methylphenyl, dimethylphenyl, trimethylphenyl, tetramethylphenyl, pentamethylphenyl, ethylphenyl, diethylphenyl, isopropylphenyl, diisopropylphenyl, tert- butylphenyl, di-tert-butylphenyl, tert-butylmethylphenyl, di(tert-butyl)methylphenyl, naphthyl, anthracenyl, chlorophenyl, dichlorophenyl, fluorophenyl, pentafluorophenyl,

bis(trifluoromethyl)phenyl, biphenyl, bertzylphenyl, methoxyphenyl, phenoxyphenyl, benzyloxyphenyl, trimethylsilylphenyl, dimethylaminophenyl and methyl(trimethylsilyl)phenyl.

[0036]

Of the substructures exemplified above, a more preferable substructure is phenyl, methylphenyl, dimethylphenyl, trimethylphenyl, diethylphenyl, trimethylsilylphenyl, etc.

[0037]

Examples of a preferable combination of the moieties represented by R¹², R¹³, R¹⁴, R¹⁵ and R¹⁶ include the following substructures represented by a substructural formula (5):

wherein R , R , R , R and R^lb are as defined above:

[0038]

phenyl, methylphenyl, dimethylphenyl, trimethylphenyl, tetramethylphenyl, pentamethylphenyl, ethylphenyl, diethylphenyl, isopropylphenyl, diisopropylphenyl, tert- butylphenyl, di-tert-butylphenyl, tert-butylmethylphenyl, di(tert-butyl)methylphenyl, naphthyl, anthracenyl, chlorophenyl, dichlorophenyl, fluorophenyl, pentafluorophenyl,

bis(trifluoromethyl)phenyl, biphenyl, benzylphenyl, methoxyphenyl, phenoxyphenyl, benzyloxyphenyl, trimethylsilylphenyl, dimethylaminophenyl and methyl(trimethylsilyl)phenyl.

[0039]

Of the substructures exemplified above, a more preferable sqbstructure is phenyl, methylphenyl, dimethylphenyl, trimethylphenyl, diethylphenyl, trimethylsilylphenyl, etc.

[0040]

Examples of a preferable combination of the moieties represented by R¹⁷, R¹⁸, R¹⁹, R²⁰ and R²¹ include the following substructures represented by a substructural formula (6):

_R19

^{R1 R2}°

xX ⁽⁶⁾

wherein R¹⁷, R¹⁸, R¹⁹, R²⁰ and R²¹ are as defined above: [0041]

bis(trifluoromethyl)phenyl, biphenyl, benzylphenyl, methoxyphenyl, phenoxyphenyl, benzyloxyphenyl, tnmethylsilylphenyl, dimethylaminophenyl and methyl(trimethylsilyl)phenyl.

[0042]

Of the substructures exemplified above, a more preferable substructure is phenyl, methylphenyl, dimethylphenyl, trimethylphenyl, diethylphenyl, tnmethylsilylphenyl, etc.

[0043]

In the transition metal ion complexes (1-1) and (1-2), R¹⁰ and R¹¹ are each independently preferably a hydrogen atom, an alkyl group having 1 to 20 carbon atoms or an aralkyl group having 7 to 20 carbon atoms, and examples thereof include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl and benzyl group.

[0044]

Examples of a preferable combination of the moieties represented by R¹⁰ and R¹¹ include the following substructures represented by substructural formula (7):

wherein R¹⁰ and R^u are as defined above:

[0045]

dimethylsilylene, diethylsilylene, ethylmethylsilylene, di(n-propyl)silylene, methyl(n-propyl)silylene, di(n-butyl)silylene, n-butylmethylsilylene, n-hexylmethylsilylene, methyl(n-octyl)silylene, n-decylmethylsilylene, methyl(n-octadecyl)silylene,

cyclohexylmethylsilylene and cyclotetramethylenesilylene.

[0046]

Preferable examples thereof include substructures represented by substructural formula (7), wherein

R¹⁰ and R^u are the same as each other and are

an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent.

Specifically, the substructure is dimethylsilylene, diethylsilylene,

ethylmethylsilylene, n-butylmethylsilylene, cyclohexylmethylsilylene,

cyclotetramethylenesilylene, etc. [0047]

In the transition metal ion complexes (1-1), (1-2) and (1-3), X¹ and X² are each independently preferably a halogen atom, an alkyl group having 1 to 20 carbon atoms or an aralkyl group having 7 to 20 carbon atoms, more preferably an alkyl group having 1 to 20 carbon atoms.

[0048]

Examples of the transition metal ion complex (1-1) include the following ion complexes:

[0049]

dimethyltitanium cation complexes such as [{ l-dimethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- diethylphenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-phenyldi(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- diisopropylphenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-di(n-butyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- di(isobutyl)phenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -di(sec-butyl)phenylsilyl-2,3 ,4, 5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- di(tert-butyl)phenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -ethylmethylphenylsily 1-2, 3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methy lpheny l(n-propyl) silyl-2, 3 ,4, 5 -tetramethylcy clopentadieny 1 } dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-methylphenyl(isopropyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1-n- butylmethylphenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -isobutylmethylphenylsilyl-2,3 ,4, 5 - tetramethylcy clopentadieny 1} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- sec-butylmethylphenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-tert-butylmethylphenylsilyl-2,3,4,5- tetramethy Icy clopentadieny 1} dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- cyclohexylmethylphenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -methyl(n-octadecyl)phenylsilyl-2, 3 ,4, 5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate],

[0050]

[ { 1 -dimethyl(3 , 5-dimethylphenyl)sily 1-2,3 ,4, 5 - tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- diethyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [ { l-(3,5-dimethylphenyl)di(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- diisopropyl(3 , 5 -dimethylpheny l)sily 1-2, 3,4,5 -tetramethy Icy clopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -di(n-butyl)(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5 - tetramethy Icy clopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- di(isobutyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -di(sec-butyl)(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5 - tetramethylcy clopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- di(tert-butyl)(3 , 5-dimethy lphenyl)silyl-2, 3 ,4, 5-tetramethylcy clopentadienyl } dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-ethylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcy clopentadienyl} dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- methyl(3 , 5-dimethylphenyl)(n-propyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methyl(3,5-dimethylphenyl)(isopropyl)silyl-2,3,4,5- tetramethy Icy clopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1-n- butylmethyl(3 , 5-dimethylphenyl)silyl-2, 3 ,4, 5-tetramethylcyclopentadienyl } dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-isobutylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- sec-butylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-tert-butylmethyl(3,5-dimethylphenyl)silyl- 2, 3 ,4, 5 -tetramethylcyclopentadieny 1 } dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-cyclohexylmethyl(3,5-dimethylphenyl)silyl- 2, 3 ,4, 5-tetramethylcy clopentadienyl } dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-methyl(n-octadecyl)(3,5-dimethylphenyl)silyl- 2,3 ,4, 5-tetramethylcyclopentadienyl } dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate],

[0051]

[ { 1 -dimethyl(3 , 5-diethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- diethy 1(3 , 5 -diethylpheny 1) sily 1-2, 3 ,4, 5 -tetramethylcy clopentadienyl } dimethy Ititanium cation][tetrakis(pentafluorophenyl)borate], [{ l-(3,5-diethylphenyl)di(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- diisopropyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-di(n-butyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- di(isobutyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-di(sec-butyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- di(tert-butyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -ethylmethyl(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methyl(3,5-diethylphenyl)(n-propyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-methyl(3,5-diethylphenyl)(isopropyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-n-butylmethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- isobutylmethyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-sec-butyImethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- tert-butylmethy 1(3 , 5 -diethy lphenyl)silyl -2, 3,4,5 -tetramethylcy clopentadienyl } dimethy Ititanium cation][tetrakis(pentafluorophenyl)borate], [{ l-cyclohexylmethyl(3,5-diethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -methyl(n-octadecyl)(3 , 5-diethylphenyl)silyl- 2, 3 ,4, 5 -tetramethy lcyclopentadienyl } di methy Ititanium

cation][tetrakis(pentafluorophenyl)borate],

[0052]

[{ l-dimethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- diethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethy Icy clopentadienyl} dimethy Ititanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- (5-methyl-3-trimethylsilyl-phenyl)di(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethy Ititanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- diisopropyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 di(n-butyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 di(isobutyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 di(sec-butyl)(5 -methyl-3 -trimethylsi lyl-phenyl)sily 1-2, 3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 di(tert-butyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 ethylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 methyl(5-methyl-3-trimethylsilyl-phenyl)(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 methyl(5-methyl-3-trimethylsilyl-phenyl)(isopropyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 butylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 isobutylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 sec-butylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1 tert-butylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadieny I } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 cyclohexylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate] and [{ l-methyl(n-octadecyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate] .

[0053]

Moreover, examples of the transition metal ion complex (1-1) also include dimethyltitanium cation complexes obtained by substituting "2-methylcyclopentadienyl", "3- methylcyclopentadienyl", "2,3-dimethylcyclopentadienyl", "2,4-dimethylcyclopentadienyl", "2,5-dimethylcyclopentadienyl", "2,3,5-trimethylcyclopentadienyl", "2-ethylcyclopentadienyl" " 3 -ethylcyclopentadienyl " , "2-n-propylcyclopentadienyl " , "3 -n-propylcyclopentadienyl " , "2- isopropylcyclopentadienyl", "3-isopropylcyclopentadienyl", "2-n-butylcyclopentadienyl^M, "3-n butylcyclopentadienyl", "2-sec-butylcyclopentadienyl", "3-sec-butylcyclopentadienyl", "2-tert- butylcyclopentadienyl", "3-tert-butylcyclopentadienyl", "2-phenylcyclopentadienyl", "3- phenylcyclopentadienyl", "2-benzylcyclopentadienyl", "3-benzylcyclopentadienyl", "indenyl", "2-methylindenyl", "fluorenyl", "tetrahydroindenyl", "2-methyltetrahydroindenyl" or

"octahydrofluorenyl" for "2,3,4,5-tetramethylcyclopentadienyl" in the ion complexes

exemplified above.

[0054]

Furthermore, examples of the transition metal ion complex (1-1) also include: dimethyl transition metal cation complexes such as dimethylzirconium cation complexes obtained by substituting "zirconium" for "titanium" in the ion complexes exemplified above, and dimethylhafnium cation complexes obtained by substituting "hafnium" therefor; dialkyltitanium cation complexes such as diethyltitanium cation complexes obtained by substituting "diethyl" for "dimethyl" in the ion complexes, dipropyltitanium cation complexes obtained by substituting "dipropyl" therefor and dibutyltitanium cation complexes obtained by substituting "dibutyl" therefor; diaryltitanium cation complexes such as diphenyltitanium cation complexes obtained by substituting "diphenyl" therefor and bis(pentafluorophenyl)titanium cation complexes obtained by substituting "bis(pentafluorophenyl)" therefor; diaralkyltitanium cation complexes such as dibenzyltitanium cation complexes obtained by substituting "dibenzyl" therefor;

dialkoxytitanium cation complexes such as dimethoxytitanium cation complexes obtained by substituting "dimethoxide" therefor, di-n-butoxytitanium cation complexes obtained by substituting "di-n-butoxide" therefor and diisopropoxytitanium cation complexes obtained by substituting "diisopropoxide" therefor; diaryloxytitanium cation complexes such as

diphenoxytitanium cation complexes obtained by substituting "diphenoxide" therefor;

diaralkyloxytitanium cation complexes such as dibenzyloxytitanium cation complexes obtained by substituting "dibenzyloxide" therefor; and diamidotitanium cation complexes such as bis(dimethylamido)titanium cation complexes obtained by substituting "bis(dimethylamido)" therefor and bis(diethylamido)titanium cation complexes obtained by substituting

"bis(diethylamido)" therefor. Among them, dialkyltitanium cation complexes are preferable, and dimethyltitanium cation complexes are particularly preferable.

[0055]

Examples of the transition metal ion complex (1-2) include the following ion complexes:

[0056]

dimethyltitanium cation complexes such as [{ l-methyldiphenylsilyl-2,3,4,5- tetramethy Icyclopentadieny 1} dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- ethyldiphenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-n-propyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- isopropyldiphenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-n-butyldiphenylsilyl-2,3,4,5- tetramethy Icyclopentadieny 1} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- i sobutyldiphenylsilyl-2, 3 ,4, 5-tetramethylcyclopentadienyl } dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -sec-butyldiphenylsilyl-2, 3 ,4, 5- tetramethylcyclopentadienyl} dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- tert-butyldiphenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-cyclohexyIdiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1-n- octadecyldiphenylsilyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-methylphenyl(2-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methylphenyl(3-methylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-methylphenyl(4-methylphenyl)silyl-2,3,4,5- tetramethy Icyclopentadieny 1} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methylphenyl(2,3-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-methylphenyl(2,4-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methy Ipheny 1(2, 5 -dimethylphenyl) silyl-2,3,4,5 -tetramethy Icyclopentadieny 1 } dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-methylphenyl(2,6-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-methylphenyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- methylphenyl(3 ,4, 5-trimethylphenyl)silyl-2, 3 ,4, 5-tetramethylcyclopentadienyl } dimethyltitanium cation][tetrakis(pentafluorophenyl)borate],

[0057]

[{ l-ethylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1-n- propylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -isopropylphenyl(3 , 5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -n-butylphenyl(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- isobutylphenyl(3,5-dimethylphenyl)silyl-2,3,4,54etramethylcyclopentadienyl}dimethyltitam cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -sec-butylphenyl(3 , 5-dimethylphenyl)silyl- 2, 3 , 4, 5 -tetramethy lcyclopentadieny 1 } diniethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-tert-butylphenyl(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-cyclohexylphenyl(3,5-dimethylphenyl)silyl- 2,3 ,4, 5-tetramethylcyclopentadienyl } dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -n-octadecylphenyl(3 , 5-dimethylphenyl)silyl-

2, 3 , 4, 5 -tetramethy lcyclopentadieny 1 } dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-methyl(2-methy lpheny 1)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluoropheny l)borate], [ { 1 -methy 1(3 -methylphenyl)(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluoropheny l)borate] , [ { 1 -methyl(4-methylphenyl)(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluoropheny l)borate], [ { 1 -methyl(2,3 -dimethylphenyl)(3 , 5- dimethy lpheny 1) sily 1-2, 3 , 4, 5 -tetramethy lcyclopentadienyl } dimethyltitanium

cation] [tetrakis(pentafluoropheny l)borate], [ { 1 -methyl(2,4-dimethylphenyl)(3 , 5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluoropheny l)borate], [ { 1 -methyl(2, 5 -dimethy lpheny 1)(3 , 5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-methylphenyl(2,6-dimethylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-methylbis(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- methyl(3 , 5 -dimethy lphenyl)(3 ,4, 5-trimethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate],

[0058] [ { 1 -ethylphenylQ , 5-diethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1-n- propylphenyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -isopropylphenyl(3 , 5 -diethy Ipheny l)silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1-n- butylphenyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-isobutylphenyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- sec-butylphenyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [ { 1 -tert-butylphenyl(3, 5-diethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- cyclohexylphenyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -n-octadecylphenyl(3 , 5-diethylphenyl)silyl- 2, 3 , 4, 5 -tetramethy lcyclopentadieny 1 } dimethy ltitanium

cation] [tetrakis(pentafluoropheny l)borate], [ { 1 -methyl(2-methylphenyl)(3 , 5 -diethy Ipheny l)silyl- 2, 3 ,4, 5 -tetramethylcyclopentadieny 1 } dimethy ltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -methyl(3 -methylphenyl)(3 , 5-diethylphenyl)silyl- 2, 3 ,4, 5 -tetramethylcyclopentadienyl } dimethy ltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-methyl(4-methylphenyl)(3,5-diethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate] , [ { 1 -methyl(2, 3 -dimethy Ipheny 1)(3 , 5 - diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -methyl(2,4-dimethylphenyl)(3 , 5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -methyl(2, 5-dimethylphenyl)(3 , 5- diethylphenyl)silyl-2,3 ,4,5 -tetramethylcyclopentadienyl } dimethy ltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-methylphenyl(2,6-dimethylphenyl)(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-methylbis(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methyl(3,5-diethylphenyl)(3,4,5-trimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate],

[0059]

[{ l-ethylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- propylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- isopropylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- butylphenyl(5 -methy 1-3 -trimethy lsilyl-pheny l)silyl -2, 3 , 4, 5 - tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- isobutylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- sec-butylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ l- tert-butylphenyl(5-methyl-3-trimet^

tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- cyclohexylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljdimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- octadecylpheny l(5-methy 1-3 -trimethy 1 silyl-pheny 1) silyl-2, 3 , 4, 5 - tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methyl(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- methyl(3 -methylphenyl)(5 -methyl-3 -trimethylsilyl-phenyl)silyl-2,3 ,4,5 - tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- methyl(4-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methyl(2,3-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methyl(2,4-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljdimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methyl(2,5-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methylphenyl(2,6-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methylbis(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate] and [ { 1 -methyl(5-methyl-3 -trimethylsilyl-phenyl)(3 ,4, 5-trimethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadieny 1 } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate] .

[0060]

Moreover, examples of the transition metal ion complex (1-2) also include dimethyltitanium cation complexes obtained by substituting "2-methylcyclopentadienyl", "3- methylcyclopentadienyl", "2,3-dimethylcyclopentadienyl", "2,4-dimethylcyclopentadienyl", "2,5-dimethylcyclopentadienyl", "2,3,5-trimethylcyclopentadienyl", "2-ethylcyclopentadienyl", "3-ethylcyclopentadienyl", "2-n-propylcyclopentadienyl", "3-n-propylcyclopentadienyl", "2- isopropylcyclopentadienyl", "3-isopropylcyclopentadienyl", "2-n-butylcyclopentadienyl", "3-n- butylcyclopentadieny 1 " , " 2-sec-butylcyclopentadieny 1 " , " 3 -sec-butylcyclopentadieny 1" , "2-tert- butylcyclopentadienyl", "3-tert-butylcyclopentadienyl", "2-phenylcyclopentadienyl", "3- phenylcyclopentadienyl", "2-benzylcyclopentadienyl", "3-benzylcyclopentadienyl", "indenyl", "2-methylindenyl", "fluorenyl", "tetrahydroindenyl", "2-methyltetrahydroindenyl" or

exemplified above.

[0061]

Furthermore, examples of the transition metal ion complex (1-2) also include: dimethyl transition metal cation complexes such as dimethylzirconium cation complexes obtained by substituting "zirconium" for "titanium" in the ion complexes exemplified above, and dimethylhafnium cation complexes obtained by substituting "hafnium" therefor; dialkyltitanium cation complexes such as diethyltitanium cation complexes obtained by substituting "diethyl" for "dimethyl" in the ion complexes, dipropyltitanium cation complexes obtained by substituting "dipropyl" therefor and dibutyltitanium cation complexes obtained by substituting "dibutyl" therefor; diaryltitanium cation complexes such as diphenyltitanium cation complexes obtained by substituting "diphenyl" therefor and bis(pentafluorophenyl)titanium cation complexes obtained by substituting "bis(pentafluorophenyl)" therefor; diaralkyltitanium cation complexes such as dibenzyltitanium cation complexes obtained by substituting "dibenzyl" therefor;

diaralkyloxytitanium cation complexes such as dibenzyloxytitamum cation complexes obtained by substituting "dibenzyloxide" therefor; and diamidotitanium cation complexes such as bis(dimethylamido)titanium cation complexes obtained by substituting "bis(dimethylamido)" therefor and bis(diethylamido)titanium cation complexes obtained by substituting "bis(diethylamido)" therefor. Among them, dialkyltitanium cation complexes are preferable, and dimethyltitanium cation complexes are particularly preferable.

[0062]

Examples of the transition metal ion complex (1-3) include the following ion complexes:

[0063]

dimethyltitanium cation complexes such as [{ l-triphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1 phenyldi(2-methylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -phenyldi(3 -methylphenyl)silyl-2, 3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenyldi(4-methylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-phenylbis(2,3-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenylbis(2,4-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-phenylbis(2,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafiuorophenyl)borate], [{ 1 phenylbis(2,6-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -phenylbis(3 , 5-dimethylphenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenylbis(3,4,5-trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate],

[0064]

[{ l-diphenyl(2-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 diphenyl(3-methylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-diphenyl(4-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 diphenyl(2,3-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-diphenyl(2,4-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljdimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1 diphenyl(2, 5-dimethylphenyl)siIyl-2, 3 ,4, 5-tetramethylcyclopentadienyl } dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-diphenyl(2,6-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 diphenyl(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadienyl } dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], { l-diphenyl(3,5-diethylphenyl)silyl-2, 3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], { 1- diphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 diphenyl(3 ,4, 5-trimethylphenyl)sily 1-2, 3 ,4, 5-tetramethylcyclopentadienyl } dimethyltitanium cation][tetrakis(pentafluorophenyl)borate],

[0065]

[ { 1 -phenyl(2-methylphenyl)(3 , 5-dimethylphenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 pheny 1(3 -methy lphenyl)(3 , 5 -dimethylpheny l)sily 1-2, 3 ,4, 5 - tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- phenyl(4-methylpheny 1)(3 , 5 -dimethylphenyl) sily 1-2, 3 ,4, 5 - tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- phenyl(2,3-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- phenyl(2,4-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- phenyl(2,5-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- pheny 1(2, 6-dimethy lpheny 1)(3 , 5 -dimethylpheny l)sily 1-2, 3 ,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- phenyl(3,5-dimethylphenyl)(3,4,5-trimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [0066]

[{ l-di(2-methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- di(3 -methylphenyl)(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- di(4-methylphenyl)(3 , 5 -dimethy lphenyi)silyl-2, 3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- bis(2, 3 -dimethy lpheny l)(3 , 5 -dimethy lpheny l)sily 1-2, 3 ,4, 5 - tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- bis(2,4-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 bis(2,5-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 bis(2,6-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 tris(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluoropheny l)borate] , [ { 1 -(3 , 5 -dimethylphenyl)bis(3 ,4,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate],

[0067]

[ { 1 -phenyl(2-methylphenyl)(3 , 5 -diethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 pheny 1(3 -methylpheny 1)(3 , 5 -diethylpheny 1) silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(4-methylphenyl)(3 , 5 -diethylpheny l)sily 1-2, 3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(2,3-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(2,4-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(2, 5 -dimethy lphenyl)(3 , 5 -diethylpheny l)si lyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(2,6-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethy ltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 pheny 1(3 , 5 -diethy lphenyl)(3 ,4, 5 -trimethy lpheny l)sily 1-2, 3,4,5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [0068]

[ { 1 -di(2-methylphenyl)(3 , 5 -diethy lphenyl) silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- di(3 -methylpheny 1)(3 , 5 -diethylphenyl) silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1· di(4-methylphenyl)(3 , 5 -diethylphenyl) silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- bis(2,3-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 bis(2,4-dimethylphenyl)(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1 bis(2,5-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 bis(2,6-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljdimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 tris(3 , 5 -diethy lphenyl) sily 1-2, 3 ,4, 5 -tetramethylcy cl opentadieny } dimethy ltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-(3,5-diethylphenyl)bis(3,4,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate],

[0069]

[{ l-phenyl(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethy ltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(3-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethy ltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(4-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(2,3-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(2,4-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethy ltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(2, 5 -dimethylpheny l)(5-methyl-3 -trimethylsilyl-phenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyljdimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenyI(2,6-dimethyIphenyl)(5-methyl-3-trimethylsilyl-phenyl)siIyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 phenyl(5-methyl-3-trimethylsilyl-phenyl)(3,4,5-trimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [0070]

[{ l-di(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl} dimethy ltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 di(3-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljdimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1 di(4-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- bis(2,3-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- bis(2,4-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- bis(2,5-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- bis(2,6-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ 1- tris(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl }dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate] and [ { 1 -(5-methyl-3 -trimethylsilyl-phenyl)bis(3 ,4, 5-dimethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate] .

[0071]

Moreover, examples of the transition metal ion complex (1-3) also include dimethyltitanium cation complexes obtained by substituting "2-methylcyclopentadienyl", "3- methylcyclopentadienyl", "2,3-dimethylcyclopentadienyl", "2,4-dimethylcyclopentadienyl", "2,5-dimethylcyclopentadienyl", "2,3,5-trimethylcyclopentadienyl", "2-ethylcyclopentadienyl", " 3 -ethylcyclopentadienyl " , " 2-n-propylcyclopentadienyl " , "3 -n-propylcyclopentadienyl " , "2- isopropylcyclopentadienyl", "3-isopropylcyclopentadienyl", "2-n-butylcyclopentadienyl", "3-n- butylcyclopentadienyl", "2-sec-buty cyclopentadienyl", "3-sec-butylcyclopentadienyl", "2-tert- butylcyclopentadienyl", "3-tert-butylcyclopentadienyl", "2-phenylcyclopentadienyl", "3- phenylcyclopentadienyl", "2-benzylcyclopentadienyl", "3-benzylcyclopentadienyl", "indenyl", "2-methylindenyl", "fluorenyl", "tetrahydroindenyl", "2-methyltetrahydroindenyl" or

exemplified above.

[0072]

Furthermore, examples of the transition metal ion complex (1-3) also include: dimethyl transition metal cation complexes such as dimethylzirconium cation complexes obtained by substituting "zirconium" for "titanium" in the ion complexes exemplified above, and dimethylhafnium cation complexes obtained by substituting "hafnium" therefor; dialkyltitanium cation complexes such as diethyltitanium cation complexes obtained by substituting "diethyl" for "dimethyl" in the ion complexes, dipropyltitanium cation complexes obtained by substituting "dipropyl" therefor and dibutyltitanium cation complexes obtained by substituting "dibutyl" therefor; diaryltitanium cation complexes such as diphenyltitanium cation complexes obtained by substituting "diphenyl" therefor and bis(pentafluorophenyl)titanium cation complexes obtained by substituting "bis(pentafluorophenyl)" therefor; diaralkyltitanium cation complexes such as dibenzyltitanium cation complexes obtained by substituting "dibenzyl" therefor;

[0073]

A represents a counter anion. The counter anion is an anion that can stabilize the cation of the element of Group 4 of the Periodic Table represented by M, and examples thereof include: anions of boron compounds such as tris(pentafluorophenyl)methylborate,

tetrakis(pentafluorophenyl)borate, tetra(phenyl)borate, tetra(tolyl)borate,

tetrakis(pentafluorophenyl)borate, tetrakis(dimethylphenyl)borate,

tetrakis(trifluoromethylphenyl)borate and tetrakis(4-fiuorophenyl)borate; and anions of aluminum compounds such as tris(pentafluorophenyl)methylaluminate,

tetrakis(pentafluorophenyl)aluminate, tetra(phenyl)aluminate, tetra(tolyl)aluminate,

tetrakis(pentafluorophenyl)aluminate, tetrakis(dimethylphenyl)aluminate,

tetrakis(trifluoromethylphenyl)aluminate, tetrakis(4-fluorophenyl)aluminate. The counter anion is preferably tris(pentafluorophenyl)methylborate, tetrakis(pentafluorophenyl)borate, tris(pentafluorophenyl)methylaluminate, tetrakis(pentafluorophenyl)aluminate, etc., more preferably tetrakis(pentafluorophenyl)borate.

[0074]

Preferable examples of the transition metal ion complex represented by the formula (1-1), (1-2) or (1-3) include [{ l-dimethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- dimethyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-dimethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- dimethy 1(5 -methyl-3 -trimethylsily 1-3 , 5 -dimethy lpheny l)sily 1-2, 3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methyldiphenylsilyl-2, 3 ,4, 5-tetramethylcyclopentadienyl } dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -methylbis(3 , 5-dimethylphenyl)silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- methylbis(3 , 5 -diethylphenyl)silyl-2,3 ,4, 5 -tetramethylcyclopentadienyl } dimethyltitanium cation][tetrakis(pentafluorophenyl)borate], [{ l-methylbis(5-methyl-3-trimethylsilyl-phenyl)silyl-

2, 3 ,4, 5 -tetramethylcyclopentadienyl } dimethyltitanium

cation] [tetrakis(pentafluorophenyl)borate], [ { 1 -triphenylsilyl-2, 3 ,4, 5- tetramethylcyclopentadienyl} dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate], [{ 1- tris(3 , 5 -dimethylphenyl) silyl-2,3,4,5 -tetramethylcyclopentadienyl } dimethyltitanium

cation][tetrakis(pentafluorophenyl)borate], [{ l-tris(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate] and [{ l-tris(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate] .

[0075]

The transition metal ion complexes (1-1), (1-2) and (1-3) can be produced from a transition metal complex represented by formula (2-1) (hereinafter, abbreviated to a "transition metal complex (2-1)"), a transition metal complex represented by formula (2-2) (hereinafter, abbreviated to a "transition metal complex (2-2)") and a transition metal complex represented by formula (2-3) (hereinafter, abbreviated to a "transition metal complex (2-3)"), respectively, by similar methods:

wherein R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, X¹, X² and M are as defined above, and X³ represents an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an aryl group having 6 to 20 carbon atoms which may have a halogen atom as a substituent or ay have a halogen atom as a substituent,

wherein R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, Rⁿ, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, X¹, X² and M

defined above, and

X³ represents

an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an aryl group having 6 to 20 carbon atoms which may have a halogen atom as a substituent or an aralkyl group having 7 to 20 carbon atoms which may have a halogen atom as a substituent, and

wherein R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, R²¹, X¹, X² and M are as defined above, and

X³ represents

an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an aryl group having 6 to 20 carbon atoms which may have a halogen atom as a substituent or an aralkyl group having 7 to 20 carbon atoms which may have a halogen atom as a substituent.

Hereinafter, the transition metal ion complex (1-1) will be described as an example.

[0076]

The transition metal ion complex (1-1) can be produced by a method comprising the step of reacting the transition metal complex (2-1) with one or more compounds selected from the compound group consisting of the following compounds (Dl), (D2) and (D3)

(hereinafter, abbreviated to a compound (D)):

(Dl). a compound represented by formula DQ¹Q²Q³,

(D2): a borate compound represented by formula T⁺(DQ⁴Q⁵Q⁶Q⁷)^", and

(D3): a borate compound represented by formula (L-H)⁺(DQ⁸Q⁹Q¹⁰Q^U)^", wherein D represents a trivalent boron; Q¹, Q², Q³, Q⁴, Q⁵, Q⁶, Q⁷, Q⁸, Q⁹, Q¹⁰ and Q¹¹ are the same as or different from each other and each independently represent a halogen atom, a hydrocarbyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, a hydrocarbylsilyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an alkoxy group having 1 to 20 carbon atoms which may have a halogen atom as a substituent or a dihydrocarbylamino group having 2 to 20 carbon atoms which may have a halogen atom as a substituent; T⁺ represents an inorganic or organic cation; and (L-H)⁺ represents Broensted acid.

[0077]

Examples of the transition metal complex (2-1) include the following complexes:

[0078]

trimethyltitanium complexes such as [l-dimethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -phenyldi(n-propyl)silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -diisopropylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-di(n-butyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -di(isobutyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-di(sec-butyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-di(tert-butyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-ethylmethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methylphenyl(n-propyl)silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyljtrimethyltitanium, [l-methylphenyl(isopropyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-n-butylmethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-isobutylmethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-sec-butylmethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -tert-butylmethylphenylsilyl-2,3 ,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-cyclohexylmethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(n-octadecyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [0079]

[l-dimethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-(3,5-dimethylphenyl)di(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diisopropyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethyicyclopentadienyl]trimethyltitanium, [l-di(n-butyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-di(isobutyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-di(sec-butyl)(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-di(tert-butyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-ethylmethyl(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methyl(3,5- dimethylphenyl)(n-propyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1- methyl(3 , 5 -dimethy lphenyl)(isopropyl) silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium, [l-n-butylmethyl(3,5-dimethylphenyl)silyl- 2, 3 ,4, 5 -tetramethy lcyclopentadieny l]trimethy ltitanium, [ 1 -isobutylmethy 1(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetraniethylcyclopentadienyl]trimethyltitanium, [1-sec- butylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethylth^ [1- tert-butylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-cyclohexylmethyl(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(n-octadecyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium,

[0080]

[ 1 -dimethyl(3 , 5 -diethy lpheny 1) silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-(3,5-diethylphenyl)di(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diisopropyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -di(n-butyl)(3 , 5-diethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium, [l-di(isobutyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-di(sec-butyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-di(tert-butyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-ethylmethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(3,5-diethylphenyl)(n-propyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1-methy 1(3,5 - diethylphenyl)(isopropyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1-n- butylmethyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1- isobutylmethyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium [ 1 -sec-butylmethyl(3 , 5-diethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl]trimethyltitanium, [l-tert-butylmethyl(3,5-diethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-cyclohexylmethyl(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitaniuni, [l-methyl(n- octadecyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [0081]

[l-dimethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-diethyl(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-(5-methyl-3- trimethylsilyl-phenyl)di(n-propyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -diisopropyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -di(n-butyI)(5-methyl-3 -trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-di(isobutyl)(5-methyl-3 trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-di(sec- butyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-di(tert-butyl)(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]triniethyltitanium, [l-ethylmethyl(5-methyl-3 trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]tritnethyltitanium, [l-methyl(5- methyl-3-trimethylsilyl-phenyl)(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methyl(5 -methy -3 -trimethylsilyl- phenyl)(isopropyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1-n- butylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-isobutylmethyl(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-sec-butylmethyl(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1- tert-butylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-cyclohexylmethyl(5-methyl-3-trimethylsilyl phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium and [l-methyl(n- octadecyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium.

[0082]

Moreover, examples of the transition metal complex (2-1) also include trimethyltitanium complexes obtained by substituting "2-methylcyclopentadienyl", "3- methy lcyclopentadieny 1 " , "2,3 -dimethy lcyclopentadieny 1 " , "2, 4-dimethy Icy clopentadienyl " , "2,5 -dimethylcy clopentadienyl" , "2,3,5 -trimethylcy clopentadienyl " , "2-ethy lcyclopentadieny 1 " , "3-ethylcyclopentadienyl", "2-n-propylcyclopentadienyl", "3-n-propylcyclopentadienyl", "2- isopropylcyclopentadieny 1" , " 3 -isopropylcy clopentadienyl " , " 2-n-butylcy clopentadienyl " , " 3 -n- butylcyclopentadienyl", "2-sec-butylcy clopentadienyl", "3-sec-butylcyclopentadienyl", "2-tert- butylcyclopentadienyl", "3-tert-butylcyclopentadienyl", "2-phenylcyclopentadienyl", "3- phenylcyclopentadienyl", "2-benzylcyclopentadienyl", "3-benzylcyclopentadienyl", "indenyl", "2-methylindenyl", "fluorenyl", "tetrahydroindenyl", "2-methyltetrahydroindenyl" or

"octahydrofluorenyl" for "2,3,4,5-tetramethylcyclopentadienyl" in the complexes exemplified above.

[0083]

Furthermore, examples of the transition metal complex (2-1) also include:

trimethyl transition metal complexes such as trimethylzirconium complexes obtained by substituting "zirconium" for "titanium" in the complexes exemplified above, and

trimethylhafnium complexes obtained by substituting "hafnium" therefor; trialkyltitanium complexes such as triethyltitanium complexes obtained by substituting "triethyl" for "trimethyl" in the complexes, tripropyltitanium complexes obtained by substituting "tripropyl" therefor and tributyltitanium complexes obtained by substituting "tributyl" therefor; triaryltitanium complexes such as triphenyltitanium complexes obtained by substituting "triphenyl" therefor and

tris(pentafluorophenyl)titanium complexes obtained by substituting "tris(pentafluorophenyl)" therefor; triaralkyltitanium complexes such as tribenzyltitanium complexes obtained by substituting "tribenzyl" therefor; dialkoxy(alkyl)titanium complexes such as

dimethoxy(methyl)titanium complexes obtained by substituting "dimethoxy(methyl)" therefor; diaryloxy(alkyl)titanium complexes such as diphenoxy(methyl)titanium complexes obtained by substituting "diphenoxy(methyl)" therefor; diaralkyloxy(alkyl)titanium complexes such as dibenzyloxy(methyl)titanium complexes obtained by substituting "dibenzyloxy(methyl)" therefor; and diamido(alkyl)titanium complexes such as bis(dimethylamido)(methyl)titanium complexes obtained by substituting "bis(dimethylamido)(methyl)" therefor and

bis(diethylamido)(methyl)titanium complexes obtained by substituting

"bis(diethylamido)(methyl)" therefor. Among them, trialkyltitanium complexes are preferable, and trimethyltitanium complexes are particularly preferable.

[0084]

Examples of the transition metal complex (2-2) include the following complexes: [0085]

trimethyltitanium complexes such as [l-methyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-ethyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-n-propyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-isopropyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-n-butyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-isobutyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-sec-butyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-tert-butyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [ 1 -cyclohexyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -n-octadecyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methylphenyl(2-methylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methylphenyl(3 -methylpheny l)silyl-2,3 ,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-methylphenyl(4-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-methylphenyl(2,3-dimethylphenyl)silyl- 2, 3 ,4, 5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methylphenyl(2,4- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1- methylphenyl(2,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitaniu [l-methylphenyl(2,6-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methylphenyl(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-methylphenyl(3,5-diethylphenyl)silyl- 2,3 ,4, 5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methy lphenyl(5 -methyl-3 - trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1- methylphenyl(3 ,4,5-trimethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium,

[0086]

[l-ethylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-n-propylphenyl(3,5-dimethylphenyl)silyl- 2,3 ,4, 5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -isopropylphenyl(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1-n- butylphenyl(3,5-dimethyIphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1- isobutylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-sec-butylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -tert-butylphenyl(3 , 5-dimethylphenyl)silyl- 2,3 ,4, 5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -cyclohexylphenyl(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1-n- octadecylphenyl(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadienyljtrimethyltitanium, [l-methyl(2-methylphenyl)(3,5- dimethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methyl(3 - methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(4-methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(2,3-dimethylphenyl)(3,5- dimethylpheny l)silyl-2,3 ,4, 5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methyl(2,4- dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(2,5-dimethylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1- methylphenyl(2,6-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-methylbis(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methyl(3 , 5-dimethylphenyl)(3 ,4,5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium,

[0087]

[ 1 -ethylphenyl(3 , 5-diethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium, [l-n-propylphenyl(3,5-diethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-isopropylphenyl(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-n-butylphenyl(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 - isobutylphenyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-sec-butylphenyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [ 1 -tert-butylphenyl(3, 5-diethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyljtrimethyltitanium, [ 1 -cyclohexylphenyl(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1-n- octadecylphenyl(3 , 5 -diethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methyl(2-methylphenyl)(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyljtrimethyltitanium, [l-methyl(3-methylphenyl)(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(4- methylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltrt^

[ 1 -methyl(2,3 -dimethylphenyl)(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(2,4-dimethylphenyl)(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(2,5- dimethylphenyl)(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -methylphenyl(2,6-dimethylphenyl)(3 , 5 -diethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyljtrimethyltitanium, [l-methylbis(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcy clopentadienyl]trimethy ltitanium, [ 1 -methy 1(3 , 5 -diethylpheny 1)(3 ,4, 5 - trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium,

[0088]

[l-ethylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-n-propylphenyl(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-isopropylphenyl(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1- n-butylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-isobutylphenyl(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-sec-butylphenyl(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium [1- tert-butyiphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -cyclohexylphenyl(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-n-octadecylphenyl(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitani [1- methyl(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-methyl(3-methyIphenyI)(5-methyI-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(4- methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(2,3-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 - methyl(2,4-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-methyl(2,5-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1- methylphenyl(2,6-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [ 1 -methylbis(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium and [l-methyl(5-methyl-3- trimethylsilyl-phenyl)(3,4,5-trimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium.

[0089] Moreover, examples of the transition metal complex (2-2) also include trimethyltitanium complexes obtained by substituting "2-methylcyclopentadienyl", "3- methylcyclopentadienyl", "2,3-dimethylcyclopentadienyl", "2,4-dimethylcyclopentadienyl", "2,5 -dimethylcyclopentadieny 1 " , "2,3,5 -trimethylcyclopentadieny 1 " , "2-ethylcy clopentadieny 1 " , "3-ethylcyclopentadienyl", 2-n-propylcyclopentadienyr*, "3-n-propylcyclopentadienyl", "2- isopropylcyclopentadienyl" , " 3 -isopropylcyclopentadienyl" , " 2-n-butylcyclopentadienyl " , " 3 -n- butylcyclopentadienyl " , "2-sec-butylcy clopentadieny 1 " , "3 -sec-butylcyclopentadieny 1 " , " 2-tert- butylcyclopentadienyl", "3-tert-butylcyclopentadienyl", "2-phenylcyclopentadienyi", "3- pheny lcyclopentadienyl " , "2-benzylcyclopentadieny 1 " , "3 -benzy Icy clopentadieny 1 " , " indeny 1 " , "2-methylindenyl", "fluorenyl", "tetrahydroindenyl", "2-methyltetrahydroindenyl" or

[0090]

Furthermore, examples of the transition metal complex (2-2) also include:

bis(diethylamido)(methyl)titanium complexes obtained by substituting

[0091] Examples of the transition metal complex (2-3) include the following complexes:

[0092]

trimethyltitanium complexes such as [l-triphenylsilyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-phenyldi(2-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitamum, [l-phenyldi(3-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-phenyldi(4-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -phenylbis(2, 3 -dimethylphenyl)silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium, [l-phenylbis(2,4-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-phenylbis(2,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-phenylbis(2,6-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -phenylbis(3 , 5-dimethylphenyl)silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium, [l-phenylbis(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-phenylbis(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-phenylbis(3,4,5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium,

[0093]

[l-diphenyl(2-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diphenyl(3-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diphenyl(4-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diphenyl(2,3-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-diphenyl(2,4-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diphenyl(2,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diphenyl(2,6-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diphenyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-diphenyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadieny l]trimethy ltitanium, [ 1 -dipheny 1(5 -methy 1-3 -trimethy 1 silyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-diphenyl(3,4,5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium,

[0094]

[ 1 -phenyl(2-methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -phenyl(3 -methylphenyl)(3 , 5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-phenyl(4- methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -phenyl(2, 3 -dimethy lpheny 1)(3 , 5 -dimethylpheny l)silyl-2, 3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-phenyl(2,4-dimethylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [1 -phenyl (2,5 - dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-phenyl(2,6-dimethylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-phenyl(3,5- dimethylphenyl)(3,4,5-trimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium,

[0095]

[ 1 -di(2-methylphenyl)(3 , 5-dimethylphenyl)sily 1-2, 3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium, [l-di(3-methylphenyl)(3,5-dimethylphenyl)silyl- 2, 3 ,4, 5 -tetramethy lcyclopentadieny l]trimethyltitanium, [ 1 -di(4-methy lpheny 1)(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-bis(2,3- dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-bis(2,4-dimethylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-bis(2,5- dimethylphenyl)(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -bis(2,6-dimethylphenyl)(3 , 5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-tris(3,5- dimethylphenyl)silyl-2, 3 ,4, 5-tetramethy lcyclopentadieny l]trimethyltitanium, [ 1 -(3 , 5 - dimethylphenyl)bis(3,4,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium,

[0096]

[ 1 -phenyl(2-methylphenyl)(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -phenyl(3 -methylphenyl)(3 , 5 - diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-phenyl(4- methylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-phenyl(2,3-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -phenyl(2,4-dimethylphenyl)(3 , 5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1-pheny 1(2,5 - dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-phenyl(2,6-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -phenyl(3 , 5-diethylphenyl)(3 ,4, 5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium,

[0097] [ 1 -di(2-methylphenyl)(3 , 5-diethylphenyl)silyl-2,3,4, 5- tetramethylcyclopentadienyl]trimethyltitanium, [l-di(3-methylphenyl)(3,5-diethylphenyl)silyt- 2,3,4,5-tetramethylcyclopentadienylJtritnethyltitanium, [l-di(4-methylphenyl)(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-bis(2,3- dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium [l-bis(2,4-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-bis(2,5-dimethylphenyl)(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-bis(2,6- dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltit

[l-tris(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium [l-(3,5- diethylphenyl)bi s(3 , 4, 5 -dimethylphenyl)silyl-2, 3 , 4, 5 - tetramethylcyclopentadienyl]trimethyltitanium,

[0098]

[l-phenyl(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-phenyl(3-methylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-phenyl(4- methylphenyl)(5-methyl-3 -trimethylsilyl-phenyl)silyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl]trimethyltitanium, [l-phenyl(2,3-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-phenyl(2,4 dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-phenyl(2,5-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitani [l-phenyl(2,6 dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium, [l-phenyl(5-methyl-3-trimethylsilyl- phenyl)(3,4,5-trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [0099]

[ 1 -di(2-methylphenyl)(5-methy 1-3 -trimethylsilyl-phenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl]trimethyltitanium, [l-di(3-methylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [ 1 -di(4- methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-bis(2,3-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium, [l-bis(2,4- dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-bis(2,5-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5 etramethylcyclopentadienyl]trimethyltitanium [l-bis(2,6- dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium, [l-tris(5-methyl-3-trimethylsilyl-phenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium and [l-(5-methyl-3-trimethylsilyl- phenyl)bis(3,4,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium.

[0100]

Moreover, examples of the transition metal complex (2-3) also include trimethyltitanium complexes obtained by substituting "2-methylcyclopentadienyl", "3- methylcyclopentadienyl", "2,3-dimethylcyclopentadienyl", "2,4-dimethylcyclopentadienyl", "2,5-dimethylcyclopentadienyl", "2,3,5-trimethylcyclopentadienyl", "2-ethylcyclopentadienyl", " 3 -ethylcyclopentadienyl " , "2-n-propylcyclopentadieny 1" , " 3 -n-propylcyclopentadienyl " , "2- isopropylcyclopentadieny 1 " , " 3 -i sopropylcyclopentadieny 1 " , " 2-n-butylcyclopentadienyl " , " 3 -n- butylcyclopentadieny 1 " , "2-sec-butylcyclopentadieny 1 " , " 3 -sec-butylcyclopentadieny 1 " , " 2-tert- butylcyclopentadienyl", "3-tert-butylcyclopentadienyl", "2-phenylcyclopentadienyl", "3- phenylcyclopentadienyl", "2-benzylcyclopentadienyl", "3-benzylcyclopentadienyl", "indenyl", "2-methylindenyl", "fluorenyl", "tetrahydroindenyl", "2-methyltetrahydroindenyl" or

[0101]

Furthermore, examples of the transition metal complex (2-3) also include:

bis(diethylamido)(methyl)titanium complexes obtained by substituting

[0102]

The method for reacting the transition metal complex (2-1) with the compound (D) can usually be performed by adding the transition metal complex (2-1) to a solvent and then adding the compound (D) to the mixture.

[0103]

The amount of the compound (D) used is usually in the range of 0.5 to 5 moles, preferably 0.7 to 1.5 moles, per mole of the transition metal complex (2-1).

[0104]

The reaction temperature is usually in the range of from -100°C to the boiling point of the solvent, preferably from -80°C to +60°C.

[0105]

The reaction is usually performed in a solvent inert to the reaction. Examples of such a solvent include aprotic solvents such as: aromatic hydrocarbon solvents such as benzene and toluene; aliphatic hydrocarbon solvents such as hexane and heptane; ether solvents such as diethyl ether, tetrahydrofiiran and 1,4-dioxane; and halogen solvents such as dichloromethane, dichloroethane, chlorobenzene, dichlorobenzene, bromobenzene and dibromobenzene. These solvents are used alone or as a mixture of two or more thereof, and the amount thereof used is usually 1 to 200 parts by weight, preferably 3 to 50 parts by weight, per part by weight of the transition metal complex (2-1).

[0106]

After completion of the reaction, the transition metal ion complex (1-1) of interest can be obtained from the obtained reaction mixture by a usual method, for example, a method in which the formed precipitates are filtered off, and the filtrate is then concentrated to deposit a transition metal complex (1-1), which is then collected by filtration.

[0107]

The compound (D) used in the production of the transition metal ion complexes (1-1) to (1-3) is one or more compounds selected from the group consisting of the compounds (Dl), (D2) and (D3) described above.

[0108] In the compounds (Dl) to (D3), Q¹, Q², Q³, Q⁴, Q⁵, Q⁶, Q⁷, Q⁸, Q⁹, Q¹⁰ and Q¹¹ are preferably a halogen atom or a hydrocarbyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent. Examples of the inorganic cation represented by T⁺ include a ferrocenium cation, an alkyl-substituted ferrocenium cation, and a silver cation.

Examples of the organic cation include a triphenylmethyl cation. Examples of (DQ⁴Q⁵Q⁶Q⁷)^" and (DQ⁸Q⁹Q¹⁰Q^U)^" include tetrakis(pentafluorophenyl)borate, tetrakis(2,3,5,6- tetrafluoropheny l)borate, tetraki s(2, 3 ,4, 5 -tetrafluorophenyl)borate, tetraki s(3 , 4, 5 - trifluorophenyl)borate, tetrakis(2,3,4-trifluorophenyl)borate,

phenyltris(pentafluorophenyl)borate, tetrakis(3,5-bistrifluoromethylphenyl)borate,

tetrakis(pentafluorophenyl)aluminate, tetrakis(2, 3,5, 6-tetrafluoropheny l)aluminate,

tetrakis(2,3,4,5-tetrafluorophenyl)aluminate, tetrakis(3,4,5-trifluorophenyl)aluminate, tetrakis(2,3,4-trifluorophenyl)aluminate, phenyltris(pentafluorophenyl)aluminate and

tetrakis(3,5-bistrifluoromethylphenyl)aluminate. Examples of the Broensted acid represented by (L-H)⁺ include trialkyl-substituted ammonium, Ν,Ν-dialkylanilinium, dialkylammonium and triarylphosphonium.

[0109]

Examples of the compound (Dl) represented by formula OQ^lQ²Q³ include tris(pentafluorophenyl)borane, tris(2, 3,5, 6-tetrafluoropheny l)borane, tris(2, 3 ,4, 5 - tetrafluorophenyl)borane, tris(3,4,5-trifIuorophenyl)borane, tris(2,3,4-trifluorophenyl)borane, phenylb i s(pentafiuoropheny l)borane, tris(pentafluorophenyl)alane, tris(2, 3 , 5 ,6- tetrafluorophenyl)alane, tris(2,3,4,5-tetrafiuorophenyl)alane, tris(3,4,5-trifiuorophenyl)alane, tris(2,3,4-trifluorophenyl)alane and phenylbis(pentafluorophenyl)alane. The compound (Dl) is preferably tris(pentafiuorophenyl)borane or tris(pentafluorophenyl)alane, most preferably tris(pentafluorophenyl)borane.

[0110]

Examples of the compound (D2) represented by formula T⁺(DQ⁴Q⁵Q⁶Q⁷)^' include ferrocenium tetrakis(pentafluorophenyl)borate, 1, Γ-dimethylferrocenium

tetrakis(pentafluorophenyl)borate, silver tetrakis(pentafluorophenyl)borate, triphenylmethyl tetrakis(pentafluorophenyl)borate, triphenylmethyl tetrakis(3,5-bistrifluoromethylphenyl)borate, ferrocenium tetrakis(pentafluorophenyl)aluminate, Ι, Γ-dimethylferrocenium

tetrakis(pentafluorophenyl)aluminate, silver tetrakis(pentafluorophenyl)aluminate,

triphenylmethyl tetrakis(pentafluorophenyl)aluminate and triphenylmethyl tetrakis(3,5- bistrifiuoromethylphenyl)aluminate. The compound (D2) is preferably triphenylmethyl tetrakis(pentafiuorophenyl)borate or triphenylmethyl tetrakis(pentafluorophenyl)aluminate, most preferably triphenylmethyl tetrakis(pentafluorophenyl)borate.

[0111]

Examples of the compound (D3) represented by formula (L-H)⁺(DQ⁸Q⁹Q¹⁰Q^U)^" include triethylammonium tetrakis(pentafluorophenyl)borate, tripropylammonium

tetrakis(pentafluorophenyl)borate, tri(normal butyl)ammonium

tetrakis(pentafluorophenyl)borate, tri(normal butyl)ammonium tetrakis(3,5- bistrifluoromethylphenyl)borate, Ν,Ν-dimethylanilinium tetrakis(pentafluorophenyl)borate, N,N- diethylanilinium tetrakis(pentafluorophenyl)borate, N,N-2,4,6-pentamethylanilinium

tetrakis(pentafluorophenyl)borate, Ν,Ν-dimethylanilinium tetrakis(3,5- bistrifluoromethylphenyl)borate, diisopropylammonium tetrakis(pentafluorophenyl)borate, dicyclohexylammonium tetrakis(pentafluorophenyl)borate, triphenylphosphonium

tetrakis(pentafluorophenyl)borate, tri(methylphenyl)phosphonium

tetrakis(pentafluorophenyl)borate, tri(dimethylphenyl)phosphonium

tetrakis(pentafluorophenyl)borate, triethylammonium tetrakis(pentafluorophenyl)aluminate, tripropylammonium tetrakis(pentafluorophenyl)aluminate, tri(normal butyl)ammonium tetrakis(pentafluorophenyl)aluminate, tri(normal butyl)ammonium tetrakis(3,5- bistrifluoromethylphenyl)aluminate, N,N-dimethylanilinium

tetrakis(pentafluorophenyl)aluminate, N,N-diethylanilinium

tetrakis(pentafluorophenyl)aluminate, N,N-2,4,6-pentamethylanilinium

tetrakis(pentafluorophenyl)aluminate, Ν,Ν-dimethylanilinium tetrakis(3,5- bistrifluoromethylphenyl)aluminate, diisopropylammonium

tetrakis(pentafluorophenyl)aluminate, dicyclohexylammonium

tetrakis(pentafluorophenyl)aluminate, triphenylphosphonium

tetrakis(pentafluorophenyl)aluminate, tri(methylphenyl)phosphonium

tetrakis(pentafluorophenyl)aluminate and tri(dimethylphenyl)phosphonium

tetrakis(pentafluorophenyl)aluminate. The compound (D3) is preferably tri(normal

butyl)ammonium tetrakis(pentafluorophenyl)borate, N,N-dimethylanilinium

tetrakis(pentafluorophenyl)borate, tri(normal butyl)ammonium

tetrakis(pentafluorophenyl)aluminate or N,N-dimethylanilinium

tetrakis(pentafluorophenyl)aluminate, most preferably N,N-dimethylanilinium

tetrakis(pentafluorophenyl)borate.

[0112]

The transition metal complex (2-1) can be obtained by reacting a transition metal complex represented by formula (2-1) wherein X³ is a halogen atom (hereinafter, abbreviated to a "transition metal halide complex (2-1)") with a lithium, sodium, potassium or magnesium compound having an alkyl, aryl or aralkyl group corresponding to X³. The transition metal complex (2-2) can be obtained by reacting a transition metal complex represented by formula (2- 2) wherein X³ is a halogen atom (hereinafter, abbreviated to a "transition metal halide complex (2-2)") with a lithium, sodium, potassium or magnesium compound having an alkyl, aryl or aralkyl group corresponding to X³. The transition metal complex (2-3) can be obtained by reacting a transition metal complex represented by formula (2-3) wherein X³ is a halogen atom (hereinafter, abbreviated to a "transition metal halide complex (2-3)") with a lithium, sodium, potassium or magnesium compound having an alkyl, aryl or aralkyl group corresponding to X³.

[0113]

Examples of the transition metal halide complex (2-1) include the following complexes:

[0114]

titanium chloride complexes such as [l-dimethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -diethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyldi(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -diisopropylphenylsilyl-2,3 ,4, 5- tetramethylcyclopentadienyl]titanium trichloride, [l-di(n-butyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-di(isobutyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-di(sec-butyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-di(tert-butyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-ethylmethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-methylphenyl(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-methylphenyl(isopropyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-n-butylmethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-isobutylmethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-sec-butylmethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-tert-butylmethylphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -cyclohexy lmethy lphenylsilyl-2, 3 ,4, 5 - tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(n-octadecyl)phenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride,

[0115]

[ 1 -dimethyl(3 , 5 -dimethy Iphenyl) silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-diethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -(3 , 5-dimethylphenyl)di(n-propyl) silyl- 2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diisopropyl(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(n- butyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1- di(isobutyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(sec-butyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -di(tert-butyl)(3 , 5-dimethylphenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl]titanium trichloride, [l-ethylmethyl(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1-methy 1(3,5 -dimethylpheny l)(n- propyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1-methy 1(3,5 - dimethylphenyl)(isopropyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1-n- butylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-isobutylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-sec-butylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-tert-butylmethyl(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-cyclohexylmethyl(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(n- octadecyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [0116]

[l-dimethyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -diethyl(3 , 5-diethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadienyl]titanium trichloride, [l-(3,5-diethylphenyl)di(n-propyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diisopropyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(n-butyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(isobutyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(sec-butyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(tert-butyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -ethylmethyl(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -methyl(3 , 5 -diethy lphenyl)(n-propyl) sily 1-2, 3 ,4, 5 - tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(3,5-diethylphenyl)(isopropyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -n-butylmethy 1(3,5 - diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 - isobutylmethyl(3 , 5 -diethylphenyl)silyl-2, 3 ,4, 5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -sec-butylmethyl(3 , 5 -diethylpheny l)sily 1-2, 3,4,5 -tetramethylcyclopentadieny l]titanium trichloride, [l-tert-butylmethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtitanium trichloride, [l-cyclohexylmethyl(3,5-diethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyljtitanium trichloride, [l-methyl(n-octadecyl)(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride,

[0117]

[l-dimethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-diethyl(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-(5-methyl-3- trimethylsilyl-phenyl)di(n-propyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diisopropyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtitanium trichloride, [l-di(n-butyl)(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(isobutyl)(5-methyl- 3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(sec- butyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(tert-butyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-ethylmethyl(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(5-methyl-3- trimethylsilyl-phenyl)(n-propyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(5-methyl-3-trimethylsilyl-phenyl)(isopropyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -n-butylmethyl(5-methyl-3 -trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-isobutylmethyl(5- methyl-3-trimethylsilyl-phenyl)silyt-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-sec-butylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -tert-butylmethyl(5-methyl-3 -trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-cyclohexylmethyl(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride and [l-methyl(n-octadecyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride.

[0118]

Moreover, examples of the transition metal halide complex (2-1) also include titanium chloride complexes obtained by substituting "2-methylcyclopentadienyl", "3- methylcyclopentadieny 1 " , "2,3 -dimethy lcyclopentadienyl " , " 2,4-dimethy lcyclopentadieny 1 " , "2,5 -dimethy lcyclopentadieny 1 " , "2,3,5 -trimethylcyclopentadienyl " , " 2-ethy lcyclopentadieny 1 " , " 3 -ethylcyclopentadienyl " , " 2-n-propylcyclopentadieny 1 " , "3 -n-propylcyclopentadienyl " , "2- isopropylcyclopentadienyl", "3-isopropylcyclopentadienyl", "2-n-butylcyclopentadienyl", "3-n- butylcyclopentadienyl " , "2-sec-butylcyclopentadienyl " , " 3 -sec-butylcyclopentadienyl", "2-tert- butylcyclopentadienyl", "3-tert-butylcyclopentadienyl", "2-phenylcyclopentadienyl", "3- phenylcyclopentadienyl", "2-benzylcyclopentadienyl", "3-benzylcyclopentadienyl", "indenyl", "2-methylindenyl", "fluorenyl", "tetrahydroindenyl", "2-methyltetrahydroindenyl" or

"octahydrofluorenyl" for "2,3,4,5-tetramethylcyclopentadienyl" in the titanium chloride complexes exemplified above.

[0119]

Furthermore, examples of the transition metal halide complex (2-1) also include: transition metal chloride complexes such as zirconium chloride complexes obtained by substituting "zirconium" for "titanium" in the complexes exemplified above, and hafnium chloride complexes obtained by substituting "hafnium" therefor; and titanium halide complexes such as titanium fluoride complexes obtained by substituting "fluoride" for "chloride" in the complexes, titanium bromide complexes obtained by substituting "bromide" therefor and titanium iodide complexes obtained by substituting "iodide" therefor.

[0120]

Specific examples of the transition metal halide complex (2-2) can include the following complexes:

[0121]

titanium chloride complexes such as [l-methyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-ethyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ l-n-propyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-isopropyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-n-butyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-isobutyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-sec-butyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-tert-butyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-cyclohexyldiphenylsilyl-2,3,4,5- tetrarhethylcyclopentadienyl]titanium trichloride, [l-n-octadecyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-methylphenyl(2-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-methylphenyl(3-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-methylphenyl(4-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -methylphenyl(2, 3 -dimethylphenyl)silyl- 2,3,4, 5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -methylphenyl(2,4- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1- methylphenyl(2,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methylphenyl(2,6-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-methylphenyl(3,5-diethylphenyl)silyl-

2,3,4,5-tetramethylcyclopentadienylJtitanium trichloride, [l-methylphenyl(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1- methylphenyl(3,4,5-trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride,

[0122]

[ 1 -ethylphenyl(3 , 5-dimethylpheny l)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl]titanium trichloride, [l-n-propylphenyl(3,5-dimethylphenyl)silyl- 2, 3 ,4, 5 -tetramethylcyclopentadienyljtitanium trichloride, [ 1 -isopropylphenyl(3 , 5- dimethy lphenyl) sily 1-2,3, 4,5 -tetramethy lcyclopentadieny 1] titanium trichloride, [ 1 -n- butylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-isobutylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titaniurn trichloride, [ 1 -sec-butylphenyl(3 , 5 -dimethy lphenyl)sily 1-2, 3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -tert-butylphenyl(3 , 5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -cyclohexylpheny 1(3,5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1-n- octadecylpheny 1(3 , 5 -dimethy lpheny l)sily 1-2, 3,4,5 -tetramethy lcyclopentadieny l]titanium trichloride, [ 1 -methyl(2-methylphenyl)(3 ,5-dimethylphenyl)silyl-2,3 ,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -methyl(3 -methylphenyl)(3 , 5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(4- methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium

trichloride, [ 1 -methyl(2, 3 -dimethylphenyl)(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadienyljtitanium trichloride, [l-methyi(2,4-dimethylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(2,5- dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methylphenyl(2,6-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-methylbis(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -methyl(3 , 5-dimethylpheny 1)(3 ,4, 5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [0123]

[l-ethylphenyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-n-propylphenyl(3,5-diethylphenyl)silyl- 2,3 ,4, 5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -isopropylphenyl(3 , 5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1-n- butylphenyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1- isobutylphenyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-sec-butylphenyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-tert-butylphenyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -cyclohexylphenyl(3, 5-diethylphenyl)silyl- 2, 3 ,4, 5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -n-octadecylphenyl(3 ,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(2- methylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(3-methylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(4-methylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethy lcyclopentadienyl]titanium trichloride, [ 1 -methyl (2, 3 -dimethy lpheny 1)(3 , 5 - diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(2,4- dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium

trichloride, [l-methyl(2,5-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-methylphenyl(2,6-dimethylphenyl)(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methylbis(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(3,5- diethylphenyl)(3,4,5-trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride,

[0124]

[l-ethylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-n-propylphenyl(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -isopropylphenyl(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-n-butylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-isobutylphenyl(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-sec-butylphenyl(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -tert-butylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -cyclohexylphenyl(5 -methyl-3 - trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1-n- octadecylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -methyl(2-methylphenyl)(5-methyl-3 - trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1- methyl(3-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-methyl(4-methylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1- methyl(2,3 -dimethylphenyl)(5-methyl-3 -trimethylsilyl-phenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -methyl(2,4-dimethylphenyl)(5-methyl-3 - trimethylsilyl-phenyl)silyl-2,3,4, 5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 - methyl(2,5-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtitanium trichloride, [ 1 -methylphenyl(2,6-dimethylphenyl)(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-methylbis(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtitanium trichloride and [l-methyl(5-methyl-3-trimethylsilyl- phenyl)(3,4,5-trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride.

[0125]

Moreover, examples of the transition metal halide complex (2-2) also include titanium chloride complexes obtained by substituting "2-methylcyclopentadienyl", "3- methylcyclopentadienyl", "2,3-dimethylcyclopentadienyl", "2,4-dimethylcyclopentadienyl", "2,5-dimethylcyclopentadienyl", "2,3,5-trimethylcyclopentadienyl", "2-ethylcyclopentadienyl", " 3 -ethylcyclopentadienyl" , "2-n-propylcyclopentadieny 1 " , "3 -n-propylcyclopentadieny " , " 2- isopropylcyclopentadieny 1 " , " 3 -i sopropylcyclopentadienyl " , "2-n-butylcyclopentadienyl " , " 3 -n- butylcyclopentadienyl", "2-sec-butylcyclopentadienyl", "3-sec-butylcyclopentadienyl", "2-tert- butylcyclopentadienyl", "3-tert-butylcyclopentadienyl", "2-phenylcyclopentadienyl", "3- phenylcyclopentadienyl", "2-benzylcyclopentadienyl", "3-benzylcyclopentadienyl", "indenyl", "2-methylindenyl", "fluorenyl", "tetrahydroindenyl", "2-methyltetrahydroindenyl" or

[0126]

Furthermore, examples of the transition metal halide complex (2-2) also include: titanium halide complexes such as zirconium chloride complexes obtained by substituting "zirconium" for "titanium" in the complexes exemplified above, and hafnium chloride complexes obtained by substituting "hafnium" therefor; and titanium halide complexes such as titanium fluoride complexes obtained by substituting "fluoride" for "chloride" in the complexes, titanium bromide complexes obtained by substituting "bromide" therefor and titanium iodide complexes obtained by substituting "iodide" therefor.

[0127]

Examples of the transition metal halide complex (2-3) include the following complexes:

[0128]

titanium chloride complexes such as [l-triphenylsilyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyldi(2-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyldi(3-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyldi(4-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenylbis(2,3-dimethylphenyl)silyl-2,3,4,5 tetramethylcyclopentadienyl]titanium trichloride, [l-phenylbis(2,4-dimethylphenyl)silyl-2,3,4,5 tetramethylcyclopentadienyl]titanium trichloride, [l-phenylbis(2,5-dimethylphenyl)silyl-2,3,4,5 tetramethylcyclopentadienyl]titanium trichloride, [l-phenylbis(2,6-dimethylphenyl)silyl-2,3,4,5 tetramethylcyclopentadienyl]titanium trichloride, [ l-phenylbis(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5 tetramethylcyclopentadienyl]titanium trichloride, [l-phenylbis(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenylbis(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-phenylbis(3,4,5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride,

[0129]

[l-diphenyl(2-methylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diphenyl(3-methylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diphenyl(4-methylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diphenyl(2,3-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diphenyl(2,4-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diphenyl(2,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diphenyl(2,6-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diphenyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-diphenyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -diphenyl(5-methyl-3 -trimethylsilyl-phenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadienyl]titanium trichloride, [ 1 -diphenyl(3,4,5-trimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [0130]

[l-phenyl(2-methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -phenyl(3 -methylphenyl)(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(4- methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -phenyl(2,3 -dimethylphenyl)(3 , 5 -dimethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(2,4-dimethylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -phenyl(2,5- dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(2,6-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(3,5-dimethylphenyl)(3,4,5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride,

[0131]

[ 1 -di(2-methylphenyl)(3 , 5-dimethylphenyl)silyl-2,3,4, 5- tetramethylcyclopentadienyl]titanium trichloride, [l-di(3-methylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(4- methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-bis(2,3-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-bis(2,4-dimethylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-bis(2,5- dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -bis(2 , 6-dimethylphenyl)(3 , 5 -dimethy lpheny l)sily 1-2, 3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-tris(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-(3,5-dimethylphenyl)bis(3,4,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride,

[0132]

[l-phenyl(2-methylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethy lcyclopentadieny l]titanium trichloride, [ 1 -pheny 1(3 -methy lpheny 1)(3 , 5 - diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(4- methylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(2,3-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(2,4-dimethylphenyl)(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(2,5- dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -phenyl(2, 6-dimethylphenyl)(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(3,5-diethylphenyl)(3,4,5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride,

[0133]

[ 1 -di(2-methylpheny 1)(3 , 5 -diethy lpheny 1) silyl-2, 3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-di(3-methylphenyl)(3,5-diethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(4-methylphenyl)(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-bis(2,3- dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium

trichloride, [l-bis(2,4-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadieny ljtitanium trichloride, [ 1 -bi s(2, 5 -dimethy lpheny 1)(3 , 5 - diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-bis(2,6- dimethylphenyl)(3 , 5-diethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadienyl]titanium

trichloride, [l-tris(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 -(3 , 5-diethylpheny l)bis(3 ,4, 5-dimethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl]titanium trichloride,

[0134]

[l-phenyl(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(3-methylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(4- methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(2,3-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadienyl]titanium trichloride, [ 1 - phenyl(2,4-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(2,5-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [1- phenyl(2, 6-dimethylphenyl)(5 -methyl-3 -trimethylsily l-phenyl)sily 1-2, 3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-phenyl(5-methyl-3-trimethylsilyl- phenyl)(3 ,4, 5-trimethylphenyl)silyl-2, 3 ,4, 5-tetramethylcyclopentadienyl]titanium trichloride, [0135]

[ 1 -di(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4, 5- tetramethylcyclopentadienyl]titanium trichloride, [l-di(3-methylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-di(4- methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-bis(2,3-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-bis(2,4- dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [l-bis(2,5-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride, [l-bis(2,6- dimethylphenyl)(S-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride, [ 1 -tris(5-methyl-3 -trimethylsilyl-phenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyljtitanium trichloride and [l-(5-methyl-3-trimethylsilyl- phenyl)bis(3 ,4, 5-dimethylphenyl)silyl-2,3 ,4, 5 -tetramethylcyclopentadienyljtitanium trichloride.

[0136]

Moreover, examples of the transition metal halide complex (2-3) also include titanium chloride complexes obtained by substituting "2-methylcyclopentadienyl", "3- methylcyclopentadienyl", "2,3-dimethylcyclopentadienyl", "2,4-dimethylcyclopentadienyl", "2,5-dimethylcyclopentadienyl", "2,3,5-trimethylcyclopentadienyl", "2-ethylcyclopentadienyl", "3-ethylcyclopentadienyl", "2-n-propylcyclopentadienyl", "3-n-propylcyclopentadienyl", "2- isopropylcyclopentadienyl", "3-isopropylcyclopentadienyl", "2-n-butylcyclopentadienyl", "3-n- butylcyclopentadienyl", "2-sec-butylcyclopentadienyl", "3-sec-butylcyclopentadienyl", "2-tert- butylcyclopentadienyl", "3-tert-butylcyclopentadienyl", "2-phenylcyclopentadienyl", "3- phenylcyclopentadienyl", "2-benzylcyclopentadienyl", "3-benzylcyclopentadienyl", "indenyl", "2-methylindenyl", "fluorenyl", "tetrahydroindenyl", "2-methyltetrahydroindenyl" or

[0137]

Furthermore, examples of the transition metal halide complex (2-3) also include: titanium halide complexes such as zirconium chloride complexes obtained by substituting

"zirconium" for "titanium" in the complexes exemplified above, and hafnium chloride complexes obtained by substituting "hafnium" therefor; and titanium halide complexes such as titanium fluoride complexes obtained by substituting "fluoride" for "chloride" in the complexes, titanium bromide complexes obtained by substituting "bromide" therefor and titanium iodide complexes obtained by substituting "iodide" therefor.

[0138]

[0139]

The transition metal halide complexes (2-1), (2-2) and (2-3) can be produced from a substituted cyclopentadiene compound represented by formula (8-1) (hereinafter, abbreviated to a "substituted cyclopentadiene compound (8-1)"), a substituted cyclopentadiene compound represented by formula (8-2) (hereinafter, abbreviated to a "substituted cyclopentadiene compound (8-2)") and a substituted cyclopentadiene compound represented by formula (8-3) (hereinafter, abbreviated to a "substituted cyclopentadiene compound (8-3)"), respectively, by similar methods:

wherein R , R^z, R^J, R , R , R , R , R , R⁹ R and R .¹1¹1 are as defined above,

wherein R , R R³, R R , R°, R', R^e, R^v, R , R , R", R , R and R^lb are as defined above, and

wherein R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, and R²¹ are as defined above.

Hereinafter, the transition metal halide complex (2-1) will be described as an example.

[0140] The transition metal halide complex (2-1) can be produced by, for example, a method comprising the steps of:

reacting the substituted cyclopentadiene compound (8-1) with a base in the presence of an amine compound; and

reacting the reaction product of the substituted cyclopentadiene compound (8-1) and the base with a transition metal compound represented by formula (9) (hereinafter, referred to as a "transition metal compound (9)"):

wherein M, X¹, X² and X³ are as defined above; and X⁴ is as defined in X¹ and X².

Hereinafter, the step of reacting the substituted cyclopentadiene compound (8-1) with a base in the presence of an amine compound may be referred to as a "1st reaction step", and the step of reacting the reaction product of the substituted cyclopentadiene compound (8-1) and the base with a transition metal compound (9) may be referred to as a "2nd reaction step".

[0141]

Isomers of the substituted cyclopentadiene compound (8-1) differing in the double

The substituted cyclopentadiene compound (8-1) has isomers differing in the double bond position of each cyclopentadiene ring. In the present invention, it represents any of them or a mixture of them.

[0142]

In the transition metal compound (9), the substituent X⁴ is as defined above, and examples thereof include the same as those exemplified for X¹ and X².

[0143]

Examples of the transition metal compound (9) include: titanium halide such as titanium tetrachloride, titanium trichloride, titanium tetrabromide and titanium tetraiodide;

amidotitanium such as dichlorobis(dimethylamino)titanium and

trichloro(dimethylamino)titanium; and alkoxytitanium such as dichlorodiisopropoxytitanium and trichloroisopropoxytitanium. Moreover, examples of the transition metal compound (9) include compounds obtained by substituting "zirconium" or "hafnium" for "titanium" in these compounds. Of them, a preferable transition metal compound (9) is titanium tetrachloride.

[0144]

Examples of the base reacted with the substituted cyclopentadiene compound (8- 1) in the 1st reaction step include organic alkali metal compounds typified by organic lithium compounds such as methyllithium, ethyllithium, n-butyllithium, sec-butyllithium, tert- butyllithium, lithiumtrimethylsilyl acetylide, lithium acetylide, trimethylsilylmethyllithium, vinyllithium, phenyllithium and allyllithium.

[0145]

The amount of the base used may be in the range of 0.5 to 5 moles per mole of the substituted cyclopentadienyl compound (8-1).

[0146]

In the reaction of the substituted cyclopentadiene compound (8-1) with the base in the 1st reaction step, an amine compound is used. Examples of such an amine compound include: primary amine compounds such as methylamine, ethylamine, n-propylamine, isopropylamine, n-butylamine, tert-butylamine, n-octylamine, n-decylamine, aniline and ethylenediamine; secondary amine compounds such as dimethylamine, diethylamine, di-n- propylamine, diisopropylamine, di-n-butylamine, di-tert-butylamine, di-n-octylamine, di-n- decylamine, pyrrolidine, hexamethyldisilazane and diphenylamine; and tertiary amine compounds such as trimethylamine, triethylamine, tri-n-propylamine, tri-n-butylamine, diisopropylethylamine, tri-n-octylamine, tri-n-decylamine, tnphenylamine, N,N-dimethylaniline, Ν,Ν,Ν',Ν'-tetramethylethylenediamine, N-methylpyrrolidine and 4-dimethylaminopyridine. The amount of such an amine compound used is preferably 10 moles or smaller, more preferably in the range of 0.5 to 10 moles, even more preferably in the range of 1 to 5 moles, per mole of the base.

[0147]

In the 1st reaction step, the reaction of the substituted cyclopentadiene compound (8-1) with the base is preferably performed in the presence of a solvent. When the solvent is used, the substituted cyclopentadiene compound (8-1) and the base are reacted in the solvent and then a transition metal compound (9) can be added into this reaction mixture to thereby further react the transition metal compound (9) with the reaction product of the substituted

cyclopentadiene compound (8-1) and the base. Solids may be deposited in the reaction mixture obtained by reacting the substituted cyclopentadiene compound (8-1) and the base. In this case, the solvent may be further added until the deposited solid is dissolved; or the deposited solid may be temporarily separated by filtration or the like, and the solvent may be added to the separated solid for dissolution or suspension, followed by the addition of a transition metal compound (9). When the solvent is used, the substituted cyclopentadiene compound (8-1), the base and the transition metal compound (9) can also be added simultaneously to the solvent to thereby perform the 1st reaction step and the 2nd reaction step almost simultaneously.

[0148]

The solvent used in the 1st reaction step or in the 1st and 2nd reaction steps is an inert solvent that does not significantly hinder the progress of the reaction associated with these steps. Examples of such a solvent include aprotic solvents such as: aromatic hydrocarbyl solvents such as benzene and toluene; aliphatic hydrocarbyl solvents such as hexane and heptane; ether solvents such as diethyl ether, tetrahydrofuran and 1,4-dioxane; amide solvents such as hexamethylphosphoric amide and dimethylformamide; polar solvents such as

acetonitrile, propionitrile, acetone, diethyl ketone, methyl isobutyl ketone and cyclohexanone; and halogen solvents such as dichloromethane, dichloroethane, chlorobenzene and

dichlorobenzene. These solvents can be used alone or as a mixture of two or more thereof, and the amount thereof used is preferably 1 to 200 parts by weight, more preferably 3 to 50 parts by weight, per part by weight of the substituted cyclopentadiene compound (8-1).

[0149]

The amount of the transition metal compound (9) used is preferably in the range of 0.5 to 3 moles, more preferably in the range of 0.7 to 1.5 moles, per mole of the substituted cyclopentadiene compound (8-1).

[0150]

The reaction temperature of the 1 st and 2nd reaction steps needs only to be a temperature between -100°C and the boiling point of the solvent inclusive and is preferably in the range of from -80 to +100°C.

[0151]

From the reaction mixture thus obtained through the 1st and 2nd reaction steps, the produced transition metal complex (2-1) wherein X³ is a halogen atom can be taken by various purification methods known in the art. For example, the transition metal complex (2-1) of interest wherein X³ is a halogen atom can be obtained by a method in which after the 1st and 2nd reaction steps, the formed precipitates are filtered off, and the filtrate is then concentrated to deposit a transition metal complex (2-1) wherein X³ is a halogen atom, which is then collected by filtration.

[0152]

Substituted cyclopentadiene compounds (8-1). (8-2) and (8-3)>

[0153]

In the substituted cyclopentadiene compounds (8-1), (8-2) and (8-3), the substituents R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰ and R²¹ are as defined above.

[0154]

Examples of the substituted cyclopentadiene compound (8-1) include the following substituted cyclopentadiene compounds:

[0155]

substituted cyclopentadiene compounds such as l-dimethylphenylsilyl-2, 3,4,5- tetramethylcyclopentadiene, 1 -diethylphenylsilyl-2,3,4,5-tetramethylcyclopentadiene, 1 - phenyldi(n-propyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-diisopropylphenylsilyl-2,3,4,5- tetramethylcyclopentadiene, l-di(n-butyl)phenylsilyl-2,3,4,5-tetramethylcyclopentadiene, 1- di(isobutyl)phenylsilyl-2,3,4,5-tetramethylcyclopentadiene, l-di(sec-butyl)phenylsilyl-2, 3,4,5 - tetramethylcyclopentadiene, 1 -di(tert-butyl)phenylsilyl-2,3 ,4, 5-tetramethylcyclopentadiene, 1 - ethylmethylphenylsilyl-2,3,4,5-tetramethylcyclopentadiene, l-methylphenyl(n-propyl)silyl- 2,3,4,5-tetramethylcyclopentadiene, l-methylphenyl(isopropyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-n-butylmethylphenylsilyl-2,3,4,5-tetramethylcyclopentadiene, 1- isobutylmethylphenylsilyl-2,3,4,5-tetramethylcyclopentadiene, 1-sec-butylmethylphenylsilyl- 2,3,4,5-tetramethylcyclopentadiene, l-tert-butylmethy phenylsilyl-2,3,4,5- tetramethylcyclopentadiene, l-cyclohexylmethylphenylsilyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(n-octadecyl)phenylsilyl-2,3,4,5-tetramethylcyclopentadiene,

[0156]

l-dimethyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1- diethyl(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadiene, 1 -(3, 5 - dimethylphenyl)di(n-propyI)silyl-2,3,4,5-tetramethylcyclopentadiene, l-diisopropyl(3,5- dimethylphenyl)silyl-2, 3,4, 5-tetramethylcyclopentadiene, 1 -di(n-butyl)(3 ,5- dimethylphenyl) sily 1-2, 3 ,4, 5 -tetramethy Icyclopentadiene, 1 -di(i sobutyl)(3 , 5 - dimethy lpheny 1) silyl-2,3,4,5 -tetramethy Icyclopentadiene, 1 -di(sec-butyl)(3 , 5 - dimethylphenyl) sily 1-2, 3 ,4, 5 -tetramethylcyclopentadiene, 1 -di(tert-butyl)(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-ethylmethyl(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1 -methy 1(3,5 -dimethylphenyl)(n- propyl)silyl-2,3 ,4, 5-tetramethy Icyclopentadiene, 1 -methyl(3 , 5-dimethylphenyl)(isopropyl)silyl- 2, 3 ,4, 5 -tetramethylcyclopentadiene, 1 -n-butylmethy 1(3 , 5 -dimethylphenyl) sily 1-2, 3 ,4, 5 - tetramethylcyclopentadiene, l-isobutylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethy Icyclopentadiene, 1 -sec-butylmethyl(3 , 5 -dimethylphenyl) sily 1-2, 3 , 4, 5 - tetramethylcyclopentadiene, l-tert-butylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-cyclohexylmethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methyl(n-octadecyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene,

[0157]

1 -dimethyl(3,5-diethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadiene, 1 - diethyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-(3,5-diethylphenyl)di(n- propyl) sily 1-2,3 ,4, 5 -tetramethylcyclopentadiene, 1 -diisopropyl(3 , 5 -diethylphenyl) sily 1-2 , 3 ,4, 5 - tetramethylcyclopentadiene, 1 -di(n-butyl)(3 , 5 -diethy lpheny l)silyl-2, 3,4,5- tetramethylcyclopentadiene, l-di(isobutyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-di(sec-butyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, 1 -di(tert-butyl)(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5- tetramethy Icyclopentadiene, 1 -ethylmethy 1(3 , 5 -diethylphenyl) silyl-2, 3 ,4, 5 - tetramethylcyclopentadiene, l-methyl(3,5-diethylphenyl)(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methyl(3,5-diethylphenyl)(isopropyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-n-butylmethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-isobutylmethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-sec-butylmethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-tert-butylmethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-cyclohexylmethyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methyl(n-octadecyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene,

[0158]

l-dimethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-diethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, 1 -(5-methyl-3 -trimethylsilyl-phenyl)di(n-propyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadiene, l-diisopropyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-di(n-butyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-di(isobutyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-di(sec-butyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-di(tert-butyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-ethylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methyl(5-methyl-3-trimethylsilyl-phenyl)(n-propyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methyl(5-methyl-3-trimethylsilyl-phenyl)(isopropyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-n-butylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-isobutylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-sec-butylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-tert-butylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-cyclohexylmethyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene and 1 -methyl(n-octadecyl)(5-methyl-3 -trimethylsilyl-phenyl)silyl- 2, 3 ,4, 5 -tetramethylcyclopentadiene .

[0159]

Moreover, examples of the substituted cyclopentadiene compound (8-1) also include substituted cyclopentadiene compounds obtained by substituting "2- methylcyclopentadiene", "3-methylcyclopentadiene", "2,3-dimethylcyclopentadiene", "2,4- dimethylcyclopentadiene", "2,5-dimethylcyclopentadiene", "2,3,5-trimethylcyclopentadiene", "2- ethylcyclopentadiene", "3-ethylcyclopentadiene", "2-n-propylcyclopentadiene", "3-n- propylcyclopentadiene", "2-isopropylcyclopentadiene", "3-isopropylcyclopentadiene", "2-n- butylcyclopentadiene", "3-n-butylcyclopentadiene", "2-sec-butylcyclopentadiene", "3-sec- butylcyclopentadiene", "2-tert-butylcyclopentadiene", "3-tert-butylcyclopentadiene", "2- phenylcyclopentadiene", "3-phenylcyclopentadiene", "2-benzylcyclopentadiene", "3- benzylcyclopentadiene", "indene", "2-methylindene", "fluorene", "tetrahydroindene", "2- methyltetrahydroindene" or "octahydrofluorene" for "2,3,4,5-tetramethylcyclopentadiene" in the substituted cyclopentadiene compounds exemplified above.

[0160]

Examples of the substituted cyclopentadiene compound (8-2) include the following substituted cyclopentadiene compounds:

[0161]

substituted cyclopentadiene compounds such as l-methyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadiene, l-ethyldiphenylsilyl-2,3,4,5-tetramethylcyclopentadiene, 1-n- propyldiphenylsilyl-2,3,4,5-tetramethylcyclopentadiene, l-isopropyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadiene, 1 -n-butyldiphenylsilyl-2, 3 ,4, 5-tetramethylcyclopentadiene, 1 - isobutyIdiphenylsilyl-2,3 ,4, 5 -tetramethylcyclopentadiene, 1 -sec-butyldiphenylsilyl-2,3,4, 5- tetramethylcyclopentadiene, 1 -tert-butyldiphenylsilyl-2,3,4,5-tetramethylcyclopentadiene, 1- cyclohexyldiphenylsilyl-2,3,4,5-tetramethylcyclopentadiene, l-n-octadecyldiphenylsilyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(2-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(3-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(4-methylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(2,3-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(2,4-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(2,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(2,6-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methylphenyl(3,4,5-trimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene,

[0162]

1 -ethylphenyl(3 , 5-dimethylphenyl)silyl-2, 3 ,4, 5-tetramethylcyclopentadiene, 1 -n- propylphenyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1- isopropylpheny 1(3 , 5 -dimethylphenyl) sily 1-2 , 3 ,4, 5 -tetramethylcyclopentadiene, 1 -n- butylphenyl(3 , 5 -dimethylphenyl) silyl-2,3,4,5 -tetramethylcyclopentadiene, 1 -isobutylphenyl(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-sec-butylphenyl(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-tert-butylphenyl(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-cyclohexylphenyl(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-n-octadecylphenyl(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(2-methylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(3-methylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(4-methylphenyl)(3,5- dimethy lpheny 1) sily 1-2, 3 ,4, 5-tetramethylcyclopentadiene, 1 -methy 1(2, 3 -dimethylpheny 1)(3 , 5 - dimethylphenyl) sily 1-2, 3 ,4, 5 -tetramethylcyclopentadiene, 1 -methyl(2,4-dimethylpheny 1)(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(2,5-dimethylphenyl)(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methylphenyl(2,6- dimethylphenyl)(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadiene, 1 -methylbis(3 , 5 - dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(3,5-dimethylphenyl)(3,4,5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene,

[0163]

1 -ethylphenyl(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5-tetramethylcyclopentadiene, 1 -n- propylphenyl(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5-tetramethylcyclopentadiene, 1 - isopropylphenyl(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1-n- butylphenyl(3 , 5 -diethylpheny 1) silyl-2, 3 , 4, 5 -tetramethylcyclopentadiene, 1 -isobutylpheny 1(3 , 5 - diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-sec-butylphenyl(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1 -tert-butylpheny 1(3,5 - diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-cyclohexylphenyl(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-n-octadecylphenyl(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(2-methylphenyl)(3,5- diethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadiene, 1 -methyl(3 -methylphenyl)(3 , 5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(4-methylphenyl)(3,5- diethylphenyl)silyl-2,3, 4, 5-tetramethylcyclopentadiene, l-methyl(2,3-dimethylphenyl)(3,5- diethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadiene, 1 -methy l(2,4-dimethylphenyl)(3 , 5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(2,5-dimethylphenyl)(3,5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1 -methylphenyl(2,6- dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methylbis(3,5- diethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadiene, 1 -methy 1(3 , 5-diethylphenyl)(3 ,4, 5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene,

[0164]

l-ethylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-n-propylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-isopropylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-n-butylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-isobutylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-sec-butylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-tert-butylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-cyclohexylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-n-octadecylphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-methyl(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl- 2,3,4,5-tetramethylcyclopentadiene, l-methyl(3-methylphenyl)(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1 -methyl (4-methylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(2,3-dimethylphenyl)(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methyl(2,4- dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1- methyl(2, 5 -dimethylphenyl)(5-methyl-3 -trimethylsilyl-phenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadiene, l-methylphenyl(2,6-dimethylphenyl)(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-methylbis(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene and l-methyl(5-methyl-3-trimethylsilyl- phenyl)(3 ,4, 5-trimethylphenyl)silyl-2,3 ,4, 5 -tetramethylcyclopentadiene.

[0165]

Moreover, examples of the substituted cyclopentadiene compound (8-2) also include substituted cyclopentadiene compounds obtained by substituting "2- methylcyclopentadiene", "3-methylcyclopentadiene", "2,3-dimethylcyclopentadiene", "2,4- dimethylcyclopentadiene", "2,5-dimethylcyclopentadiene", "2,3,5-trimethylcyclopentadiene", "2- ethylcyclopentadiene", "3-ethylcyclopentadiene", "2-n-propylcyclopentadiene", "3-n- propylcyclopentadiene " , "2-isopropylcyclopentadiene " , "3 -isopropylcyclopentadiene " , " 2-n- butylcyclopentadiene", "3-n-butylcyclopentadiene", "2-sec-butylcyclopentadiene", "3-sec- butylcyclopentadiene", "2-tert-butylcyclopentadiene", "3-tert-butylcyclopentadiene", "2- phenylcyclopentadiene", "3-phenylcyclopentadiene", "2-benzylcyclopentadiene", "3- benzylcyclopentadiene", "indene", "2-methylindene", "fluorene", "tetrahydroindene", "2- methyltetrahydroindene" or "octahydrofluorene" for "2,3,4,5-tetramethylcyclopentadiene" in the substituted cyclopentadiene compounds exemplified above.

[0166]

Examples of the substituted cyclopentadiene compound (8-3) include the following substituted cyclopentadiene compounds:

[0167]

substituted cyclopentadiene compounds such as l-triphenylsilyl-2,3,4,5- tetramethylcyclopentadiene, 1 -phenyldi(2-methylphenyl)silyl-2,3 ,4, 5- tetramethy lcyclopentadiene, 1 -phenyldi(3 -methylphenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadiene, l-phenyldi(4-methylphenyl)silyl-2,3,4,5- tetramethy lcyclopentadiene, 1 -pheny lb is(2, 3 -dimethy lpheny l)silyl-2, 3,4,5- tetramethylcyclopentadiene, l-phenylbis(2,4-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-phenylbis(2,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-phenylbis(2,6-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, 1 -phenylbis(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadiene, l-phenylbis(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-phenylbis(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-phenylbis(3,4,5-trimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene,

[0168]

l-diphenyl(2-methylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1- diphenyl(3-methylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-diphenyl(4- methylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-diphenyl(2,3-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadiene, l-diphenyl(2,4-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-diphenyl(2,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, 1 -diphenyl(2,6-dimethylphenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadiene, l-diphenyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-diphenyl(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, 1 -diphenyl(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-diphenyl(3,4,5-trimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene,

[0169]

1 -phenyl(2-methylphenyl)(3 , 5-dimethylphenyl)silyl-2, 3 ,4, 5- tetramethylcyclopentadiene, l-phenyl(3-methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethy lcyclopentadiene, 1 -phenyl(4-methylphenyl)(3 , 5 -dimethy lphenyl)sily 1-2, 3,4,5- tetramethylcyclopentadiene, l-phenyl(2,3-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-phenyl(2,4-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, 1 -phenyl(2, 5-dimethylpheny 1)(3 , 5-dimethylpheny l)silyl-2, 3 ,4, 5- tetramethylcyclopentadiene, l-phenyl(2,6-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-phenyl(3,5-dimethylphenyl)(3,4,5-trimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene,

[0170]

1 -di(2-methylphenyl)(3 , 5-dimethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadiene, l-di(3-methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-di(4-methylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-bis(2,3-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-bis(2,4-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethy lcyclopentadiene, 1 -bis(2, 5 -dimethy lpheny 1)(3 , 5 -dimethy lphenyl)sily 1-2, 3,4,5- tetramethylcyclopentadiene, l-bis(2,6-dimethylphenyl)(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-tris(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1 -(3 , 5-dimethylphenyl)bis(3 ,4, 5 -dimethylphenyl)silyl-2,3 ,4, 5-tetramethylcyclopentadiene,

[0171]

1 -phenyl(2-methylphenyl)(3 , 5-diethylphenyl)silyl-2,3 ,4, 5 - tetramethylcyclopentadiene, l-phenyl(3-methylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-phenyl(4-methylphenyI)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, 1 -pheny 1(2, 3 -dimethylpheny 1)(3 , 5-diethylpheny l)silyl-2, 3 ,4, 5- tetramethylcyclopentadiene, l-phenyl(2,4-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, 1 -phenyl(2, 5-dimethylphenyl)(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5 - tetramethylcyclopentadiene, l-phenyl(2,6-dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-phenyl(3,5-diethylphenyl)(3,4,5-trimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene,

[0172]

l-di(2-methylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-di(3-methylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-di(4- methylphenyl)(3 , 5-diethylphenyl)silyl-2, 3 ,4, 5-tetramethylcyclopentadiene, 1 -bis(2,3 - dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-bis(2,4- dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-bis(2,5- dimethylphenyl)(3,5-diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-bis(2,6- dimethylphenyl)(3 , 5-diethylpheny l)silyl-2, 3 ,4, 5 -tetramethylcyclopentadiene, 1 -tris(3 , 5- diethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-(3,5-diethylphenyl)bis(3,4,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene,

[0173]

l-phenyl(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-phenyl(3-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl- 2,3,4,5-tetramethylcyclopentadiene, l-phenyl(4-methylphenyl)(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-phenyl(2,3-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1 -phenyl (2,4-dimethylphenyl)(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-phenyl(2,5- dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1- phenyl(2,6-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-phenyl(5-methyl-3-trimethylsilyl-phenyl)(3,4,5- trimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, [0174]

l-di(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-di(3-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl- 2,3,4,5-tetramethylcyclopentadiene, l-di(4-methylphenyl)(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-bis(2,3-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-bis(2,4-dimethylphenyl)(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, l-bis(2,5- dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene, 1- bis(2,6-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene, l-tris(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene and l-(5-methyl-3-trimethylsilyl-phenyl)bis(3,4,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene.

[0175]

Moreover, examples of the substituted cyclopentadiene compound (8-3) also include substituted cyclopentadiene compounds obtained by substituting "2- methylcyclopentadiene", "3-methylcyclopentadiene", "2,3-dimethylcyclopentadiene", "2,4- dimethylcyclopentadiene", "2,5-dimethylcyclopentadiene", "2,3,5-trimethylcyclopentadiene", "2- ethylcyclopentadiene", "3-ethylcyclopentadiene", "2-n-propylcyclopentadiene", "3-n- propylcyclopentadiene", "2-isopropylcyclopentadiene", "3-isopropylcyclopentadiene", "2-n- butylcyclopentadiene", "3-n-butylcyclopentadiene", "2-sec-butylcyclopentadiene", "3-sec- butylcyclopentadiene", "2-tert-butylcyclopentadiene", "3-tert-butylcyclopentadiene", "2- phenylcyclopentadiene", "3-phenylcyclopentadiene", "2-benzylcyclopentadiene", "3- benzylcyclopentadiene", "indene", "2-methylindene", "fluorene", "tetrahydroindene", "2- methyltetrahydroindene" or "octahydrofluorene" for "2,3,4,5-tetramethylcyclopentadiene" in the substituted cyclopentadiene compounds exemplified above.

[0176]

The substituted cyclopentadiene compound (8-1) can be produced by a method comprising the steps of:

reacting a substituted cyclopentadiene compound represented by formula (10) (hereinafter, abbreviated to a "substituted cyclopentadiene compound (10)") with a base; and

reacting the reaction product of the substituted cyclopentadiene compound (10) and the base with a halogenated silyl compound represented by formula (11-1) (hereinafter, abbreviated to a "halogenated silyl compound (11-1)"); the substituted cyclopentadiene compound (8-2) can be produced by a method comprising the steps of:

reacting the substituted cyclopentadiene compound (10) with a base; and

reacting the reaction product of the substituted cyclopentadiene compound (10) and the base with a halogenated silyl compound represented by formula (11-2) (hereinafter, abbreviated to a "halogenated silyl compound (11-2)"); and

the substituted cyclopentadiene compound (8-3) can be produced by a method comprising the steps of:

reacting the substituted cyclopentadiene compound (10) with a base; and

reacting the reaction product of the substituted cyclopentadiene compound (10) and the base with a halogenated silyl compound represented by a formula (11-3) (hereinafter, abbreviated to a "halogenated silyl compound (11-3)"), respectively:

wherein R d R⁴ are as defined above, and

the moiety

wherein R⁵, R^f 6

R⁷, R⁸, R⁹, R¹⁰ and R¹¹ are as defined above, and X⁵ is a halogen atom,

wherein R⁵, R⁶, R⁷, R⁸, R⁹, R¹¹, R¹², R¹³, R¹⁴, R¹⁵ and R¹⁶ are as defined above, and X⁵ is a halogen atom, and

wherein R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, Rⁿ, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰ and R²¹ are as defined above, and X⁵ is a halogen atom.

Hereinafter, the substituted cyclopentadiene compound (8-1) will be described as an example.

[0177]

The substituted cyclopentadiene compound (10) is as follows:

wherein R¹, R², R³ and R⁴ are as defined above, and

Examples of the substituted cyclopentadiene compound (10) include the following compounds:

[0179]

methylcyclopentadiene, 1,2-dimethylcyclopentadiene, 1,3- dimethylcyclopentadiene, 1,2,3-trimethylcyclopentadiene, 1,3,4-trimethylcyclopentadiene, 1,2,3,4-tetramethylcyclopentadiene, ethylcyclopentadiene, 1,2-diethylcyclopentadiene, 1,3- diethylcyclopentadiene, 1,2,3-triethylcyclopentadiene, 1,3,4-triethylcyclopentadiene, 1,2,3,4- tetraethylcyclopentadiene, n-propylcyclopentadiene, isopropylcyclopentadiene, n- butylcyclopentadiene, sec-butylcyclopentadiene, tert-butylcyclopentadiene, n- pentylcyclopentadiene, neopentylcyclopentadiene, n-hexylcyclopentadiene, n- octylcyclopentadiene, phenylcyclopentadiene, naphthylcyclopentadiene,

trimethylsilylcyclopentadiene, triethylsilylcyclopentadiene, tert- butyldimethylsilylcyclopentadiene, indene, 2-methylindene, tetrahydroindene, 2- methyltetrahydroindene, 3-methyltetrahydroindene, 2,3-dimethyltetrahydroindene, 2- ethyltetrahydroindene, 2-n-propyltetrahydroindene, 2-isopropyltetrahydroindene, 2-n- butyltetrahydroindene, 2-sec-butyltetrahydroindene, 2-tert-butyltetrahydroindene, 2-n- pentyltetrahydroindene, 2-neopentyltetrahydroindene, 2-amyltetrahydroindene, 2-n- hexyltetrahydroindene, 2-cyclohexyltetrahydroindene, 2-n-octyltetrahydroindene, 2-n- decyltetrahydroindene, 2-phenyltetrahydroindene, 2-benzyltetrahydroindene, 2- naphthyltetrahydroindene, 2-methoxytetrahydroindene, 2-phenoxytetrahydroindene, 2- benzyloxytetrahydroindene, 2-dimethylaminotetrahydroindene, 2-trimethylsilyltetrahydroindene, fluorene and octahydrofluorene.

[0180]

The substituted cyclopentadiene compounds (10) exemplified above may have isomers differing in the double bond position of each cyclopentadiene ring. A mixture of these isomers may be used.

[0181]

The halogenated silyl compound (11-1) is as follows:

wherein R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰ and R^u are as defined above, and X⁵ is a halogen atom. [0182]

Examples of the halogenated silyl compound (11-1) include the following halogenated silyl compounds:

[0183]

chlorodimethylphenylsilane, chlorodiethylphenylsilane, chlorophenyldi(n- propyl)silane, chlorodiisopropylphenylsilane, di(n-butyl)chlorophenylsilane,

di(isobutyl)chlorophenylsilane, di(sec-butyl)chlorophenylsilane, di(tert- butyl)chlorophenylsilane, chloroethylmethylphenylsilane, chloromethylphenyl(n-propyl)siIane, chloromethylphenyl(isopropyl)silane, n-butylchloromethylphenylsilane,

isobutylchloromethylphenylsilane, sec-butylchloromethylphenylsilane, tert- butylchloromethylphenylsilane, chlorocyclohexylmethylphenylsilane, chloromethyl(n- octadecyl)phenylsilane,

[0184]

chlorodimethyl(3 , 5-dimethylphenyl)silane, chlorodiethyl(3 , 5- dimethylphenyl)silane, chloro(3,5-dimethylphenyl)di(n-propyl)silane, chlorodiisopropyl(3,5- dimethylphenyl)silane, di(n-butyl)chloro(3,5-dimethylphenyl)silane, di(isobutyl)chloro(3,5- dimethylphenyl)silane, di(sec-butyl)chloro(3,5-dimethylphenyl)silane, di(tert-butyl)chloro(3,5- dimethylphenyl)silane, chloroethylmethyl(3,5-dimethylphenyl)silane, chloromethyl(3,5- dimethylphenyl)(n-propyl)silane, chloromethyl(3,5-dimethylphenyl)(isopropyl)silane, n- butylchloromethyl(3,5-dimethylphenyl)silane, isobutylchloromethyl(3,5-dimethylphenyl)silane, sec-butylchloromethyl(3,5-dimethylphenyl)silane, tert-butylchloromethyl(3,5- dimethylphenyl)silane, chlorocyclohexylmethyl(3,5-dimethylphenyl)silane, chloromethyl(n- octadecyl)(3 , 5 -dimethy lphenyl) silane,

[0185]

chlorodimethyl(3,5-diethylphenyl)silane, chlorodiethyl(3,5-diethylphenyl)silane, chloro(3 , 5 -diethylphenyl)di(n-propyl)silane, chlorodiisopropyl(3 , 5-diethylphenyl)silane, di(n- butyl)chloro(3,5-diethylphenyl)silane, di(isobutyl)chloro(3,5-diethylphenyl)silane, di(sec- butyl)chloro(3,5-diethylphenyl)silane, di(tert-butyl)chloro(3,5-diethylphenyl)silane,

chloroethylmethyl(3,5-diethylphenyl)silane, chloromethyl(3,5-diethylphenyl)(n-propyl)silane, chloromethyl(3,5-diethylphenyl)(isopropyl)silane, n-butylchloromethy 1(3, 5 -diethylphenyl) silane, isobutylchloromethyl(3,5-diethylphenyl)silane, sec-butylchloromethyl(3,5-diethylphenyl)silane, tert-buty lchloromethyl(3 , 5 -diethylpheny l)silane, chlorocyclohexy Imethy 1(3 , 5 - diethylphenyl)silane, chloromethyl(n-octadecyl)(3, 5 -diethylphenyl) silane,

[0186] chlorodimethyl(5-methyl-3-trimethylsilyl-phenyl)silane, chlorodiethyl(5-methyl- 3-trimethylsilyl-phenyl)silane, chloro(5-methyl-3-trimethylsilyl-phenyl)di(n-propyl)silane, chlorodiisopropyl(5-methyl-3-trimethylsilyl-phenyl)silane, di(n-butyl)chloro(5-methyl-3- trimethylsilyl-phenyl)silane, di(isobutyl)chloro(5-methyl-3-trimethylsilyl-phenyl)silane, di(sec- butyl)chloro(5-methyl-3-trimethylsilyl-phenyl)silane, di(tert-butyl)chloro(5-methyl-3- trimethylsilyl-phenyl)silane, chloroethylmethyl(5-methyl-3-trimethylsilyl-phenyl)silane, chloromethyl(5-methyl-3-trimethylsilyl-phenyl)(n-propyl)silane, chloromethyl(5-methyl-3- trimethylsilyl-phenyl)(isopropyl)silane, n-butylchloromethyl(5-methyl-3-trimethylsilyl- phenyl)silane, isobutylchloromethyl(5-methyl-3-trimethylsilyl-phenyl)silane, sec- butylchloromethyl(5-methyl-3-trimethylsilyl-phenyl)silane, tert-butylchloromethyl(5-methyl-3- trimethylsilyl-phenyl)silane, chlorocyclohexylmethyl(5-methyl-3-trimethylsilyl-phenyl)silane and chloromethyl(n-octadecyl)(5-methyl-3-trimethylsilyl-phenyl)silane.

[0187]

Compounds obtained by substituting "fluoro", "bromo" or "iodo" for "chloro" in these compounds exemplified above are also included therein.

[0188]

Examples of the halogenated silyl compound (11-2) include the following halogenated silyl compounds:

[0189]

chloromethyldiphenylsilane, chloroethyldiphenylsilane, chloro-n- propyldiphenylsilane, chloroisopropyldiphenylsilane, n-butylchlorodiphenylsilane,

isobutylchlorodiphenylsilane, sec-butylchlorodiphenylsilane, tert-butylchlorodiphenylsilane, chlorocyclohexyldiphenylsilane, chloro-n-octadecyldiphenylsilane, chloromethylphenyl(2- methylphenyl)silane, chloromethylphenyl(3-methylphenyl)silane, chloro methylpheny 1(4- methylphenyl)silane, chloromethylphenyl(2,3-dimethylphenyl)silane, chloromethylphenyl(2,4- dimethylphenyl)silane, chloromethylphenyl(2,5-dimethylphenyl)silane, chloromethylphenyl(2,6- dimethylphenyl)silane, chloromethylphenyl(3,5-dimethylphenyl)silane, chloromethylphenyl(3,5- diethylphenyl)silane, chloromethylphenyl(5-methyl-3-trimethylsilyl-phenyl)silane,

chloromethylphenyl(3,4,5-trimethylphenyl)silane,

[0190]

chloroethylphenyl(3,5-dimethylphenyl)silane, chloro-n-propylpheny 1(3,5 - dimethylphenyl)silane, chloroisopropylphenyl(3,5-dimethylphenyl)silane, n- butylchlorophenyl(3,5-dimethylphenyl)silane, isobutylchlorophenyl(3,5-dimethylphenyl)silane, sec-butylchlorophenyl(3 , 5 -dimethy lpheny 1) silane, tert-butylchlorophenyl(3 , 5 - dimethylphenyl)silane, chlorocyclohexylphenyl(3,5-dimethylphenyl)silane, chloro-n- octadecylphenyl(3,5-dimethylphenyl)silane, chloromethyl(2-methylphenyl)(3,5- dimethylphenyl)silane, chloromethyl(3-methylphenyl)(3,5-dimethylphenyl)silane,

chloromethyl(4-methylphenyl)(3,5-dimethylphenyl)silane, chloromethyl(2,3- dimethylphenyl)(3,5-ditnethylphenyl)silane, chloromethyl(2,4-dimethylphenyl)(3,5- ditnethylphenyl)silane, chloromethyl(2,5-dimethylphenyl)(3,5-dimethylphenyl)silane, chloromethylphenyl(2,6-dimethylphenyl)(3,5-dimethylphenyl)silane, chloromethylbis(3,5- dimethylphenyl)silane, chloromethyl(3,5-dimethylphenyl)(3,4,5-trimethylphenyl)silane,

[0191]

chloroethylpheny 1(3 , 5 -diethylphenyl) silane, chloro-n-propylphenyl(3 , 5 - diethylphenyl)silane, chloroisopropylphenyl(3,5-diethylphenyl)silane, n-butylchlorophenyl(3,5- diethylphenyl)silane, isobutylchlorophenyl(3,5-diethylphenyl)silane, sec-butylchlorophenyl(3,5 diethylphenyl)silane, tert-butylchlorophenyl(3,5-diethylphenyl)silane,

chlorocyclohexylphenyl(3,5-diethylphenyl)silane, chloro-n-octadecylphenyl(3,5- diethylphenyl)silane, chloromethyl(2-methylphenyl)(3,5-diethylphenyl)silane, chloromethy 1(3- methylphenyl)(3,5-diethylphenyl)silane, chloromethy l(4-methylphenyl)(3, 5- diethylphenyl)silane, chloromethyl(2,3-dimethylphenyl)(3,5-diethylphenyl)silane,

chloromethyl(2,4-dimethylphenyl)(3,5-diethylphenyl)silane, chloromethyl(2,5- dimethy lpheny 1)(3 , 5 -diethylpheny l)silane, chloromethy lpheny 1(2, 6-dimethylphenyl)(3 , 5 - diethylphenyl)silane, chloromethylbis(3,5-diethylphenyl)silane, chloromethy 1(3, 5- diethylphenyl)(3,4,5-trimethylphenyl)silane,

[0192]

chloroethylphenyl(5-methyl-3-trimethylsilyl-phenyl)silane, chloro-n- propylphenyl(5-methyl-3-trimethylsilyl-phenyl)silane, chloroisopropylphenyl(5-methyl-3- trimethylsilyl-phenyl)silane, n-butylchlorophenyl(5-methyl-3-trimethylsilyl-phenyl)silane, isobutylchlorophenyl(5-methyl-3-trimethylsilyl-phenyl)silane, sec-butylchlorophenyl(5-methyl- 3-trimethylsilyl-phenyl)silane, tert-butylchlorophenyl(5-methyl-3-trimethylsilyl-phenyl)silane, chlorocyclohexylphenyl(5-methyl-3-trimethylsilyl-phenyl)silane, chloro-n-octadecylphenyl(5- methyl-3-trimethylsilyl-phenyl)silane, chloromethyl(2-methylphenyl)(5-methyl-3-trimethylsilyl phenyl)silane, chloromethyl(3-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chloromethyl(4-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chloromethyl(2,3- dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chloromethyl(2,4-dimethylphenyl)(5- methyl-3-trimethylsilyl-phenyl)silane, chloromethyl(2,5-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silane, chloromethylphenyl(2,6-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silane, chloromethylbis(5-methyl-3-trimethylsilyl-phenyl)silane and chloromethyl(5 -methyl-3 -trimethy 1 silyl-pheny 1)(3 ,4, 5 -trimethylphenyl) silane .

[0193]

[0194]

Examples of the halogenated silyl compound (11-3) include the following halogenated silyl compounds:

[0195]

chlorotriphenylsilane, chlorophenyldi(2-methylphenyl)silane, chloropheny ldi(3 - methylphenyl)silane, chlorophenyldi(4-methylphenyl)silane, chlorophenylbis(2, 3 - dimethylphenyl)silane, chlorophenylbis(2,4-dimethylphenyl)silane, chloropheny lb is(2, 5- dimethylphenyl)silane, chlorophenylbis(2,6-dimethylphenyl)silane, chlorophenylbis(3,5- dimethylphenyl)silane, chlorophenylbis(3,5-diethylphenyl)silane, chlorophenylbis(5-methyl-3- trimethylsilyl-phenyl)silane, chlorophenylbis(3,4,5-trimethylphenyl)silane,

[0196]

chlorodiphenyl(2-methylphenyl)silane, chlorodiphenyl(3-methylphenyl)silane, chlorodiphenyl(4-methylphenyl)silane, chlorodiphenyl(2,3-dimethylphenyl)silane,

chlorodiphenyl(2,4-dimethylphenyl)silane, chlorodiphenyl(2,5-dimethylphenyl)silane, chlorodiphenyl(2,6-dimethylphenyl)silane, chlorodiphenyl(3,5-dimethylphenyl)silane, chlorodiphenyl(3,5-diethylphenyl)silane, chlorodiphenyl(5-methyl-3-trimethylsilyl- phenyl)silane, chlorodiphenyl(3,4,5-trimethylphenyl)silane,

[0197]

chlorophenyl(2-methylphenyl)(3,5-dimethylphenyl)silane, chlorophenyl(3- methylphenyl)(3,5-dimethylphenyl)silane, chlorophenyl(4-tnethylphenyl)(3,5- dimethylphenyl)silane, chlorophenyl(2,3-dimethylphenyl)(3,5-dimethylphenyl)silane, chlorophenyl(2,4-dimethylphenyl)(3,5-dimethylphenyl)silane, chlorophenyl(2,5- dimethylphenyl)(3,5-dimethylphenyl)silane, chlorophenyl(2,6-dimethylphenyl)(3,5- dimethylphenyl)silane, chlorophenyl(3,5-dimethylphenyl)(3,4,5-trimethylphenyl)silane,

[0198]

chlorodi(2-methylphenyl)(3,5-dimethylphenyl)silane, chlorodi(3- methylphenyl)(3,5-dimethylphenyl)silane, chlorodi(4-methylphenyl)(3,5-dimethylphenyl)silane, chlorobis(2,3-dimethylphenyl)(3,5-dimethylphenyl)silane, chlorobis(2,4-dimethylphenyl)(3,5- dimethylphenyl)silane, chlorobis(2,5-dimethylphenyl)(3,5-dimethylphenyl)silane, chlorobis(2,6- dimethy lphenyl)(3 , 5-dimethylphenyl)silane, chlorotris(3 , 5-dimethylphenyl)silane, chloro(3 ,5- dimethylphenyl)bis(3,4,5-dimethylphenyl)silane,

[0199]

chlorophenyl(2-methylphenyl)(3 , 5-diethylphenyl)silane, chlorophenyl(3 - methylphenyl)(3,5-diethylphenyl)silane, chlorophenyl(4-methylphenyl)(3,5- diethylphenyl)silane, chlorophenyl(2,3-dimethylphenyl)(3,5-diethylphenyl)silane,

chlorophenyl(2,4-dimethylphenyl)(3,5-diethylphenyl)silane, chlorophenyl(2,5- dimethylphenyl)(3,5-diethylphenyl)silane, chlorophenyl(2,6-dimethylphenyl)(3,5- diethylphenyl)silane, chlorophenyl(3,5-diethylphenyl)(3,4,5-trimethylphenyl)silane,

[0200]

chlorodi(2-methylphenyl)(3,5-diethylphenyl)silane, chlorodi(3- methylphenyl)(3,5-diethylphenyl)silane, chlorodi(4-methylphenyl)(3,5-diethylphenyl)silane, chlorobis(2,3-dimethylphenyl)(3,5-diethylphenyl)silane, chlorobis(2,4-dimethylphenyl)(3,5- diethylphenyl)silane, chlorobis(2,5-dimethylphenyl)(3,5-diethylphenyl)silane, chlorobis(2,6- dimethylphenyl)(3,5-diethylphenyl)silane, chlorotris(3,5-diethylphenyl)silane, chloro(3,5- diethylphenyl)bis(3,4,5-dimethylphenyl)silane,

[0201]

chlorophenyl(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chlorophenyl(3-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chlorophenyl(4- methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chlorophenyl(2,3-dimethylphenyl)(5- methyl-3-trimethylsilyl-phenyl)silane, chlorophenyl(2,4-dimethylphenyl)(5-methyl-3- trimethylsilyl-phenyl)silane, chlorophenyl(2, 5-dimethylphenyl)(5-methyl-3 -trimethylsilyl- phenyl)silane, chlorophenyl(2,6-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chlorophenyl(5-methyl-3-trimethylsilyl-phenyl)(3,4,5-trimethylphenyl)silane,

[0202]

chlorodi(2-methylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chlorodi(3- methylphenyI)(5-methyl-3-trimethylsilyl-phenyl)silane, chlorodi(4-methylphenyl)(5-methyl-3 trimethylsilyl-phenyl)silane, chlorobis(2,3-dimethylphenyl)(5-methyl-3-trimethylsilyl- phenyl)silane, chlorobis(2,4-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chlorobis(2,5-dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chlorobis(2,6- dimethylphenyl)(5-methyl-3-trimethylsilyl-phenyl)silane, chlorotris(5-methyl-3-trimethylsilyl phenyl)silane and chloro(5-methyl-3-trimethylsilyl-phenyl)bis(3,4,5-dimethylphenyl)silane.

[0203]

Compounds obtained by substituting "fluoro", "bromo" or "iodo" for "chloro" i these compounds exemplified above are also included therein.

[0204]

Examples of the base reacted with the substituted cyclopentadiene compound (10) include: alkali metal hydride such as lithium hydride, sodium hydride and potassium hydride; alkaline earth metal hydride such as calcium hydride; and organic alkali metal compounds typified by organic lithium compounds such as methyllithium, ethyllithium, n-butyllithium, sec- butyllithium, tert-butyllithium, lithiumtrimethylsilyl acetylide, lithium acetylide,

trimethylsilylmethyllithium, vinyllithium, phenyllithium and allyllithium. The amount thereof used is usually in the range of 0.5- to 3 -fold by mol, preferably 0.9- to 2-fold by mol, with respect to the substituted cyclopentadiene compound (10). A usual commercially available mineral oil-containing product can be used directly as sodium hydride or potassium hydride. Of course, the mineral oil may be removed, for use, by washing with a hydrocarbyl solvent such as hexane.

[0205]

In the step of reacting the substituted cyclopentadiene compound (10) with a base, an amine compound may be used. Examples of such an amine compound include: primary anilines such as aniline, chloroaniline, bromoaniline, fluoroaniline, dichloroaniline,

dibromoaniline, difluoroaniline, trichloroaniline, tribromoaniline, trifluoroaniline,

tetrachloroaniline, tetrabromoaniline, tetrafluoroaniline, pentachloroaniline, pentafluoroaniline, nitroaniline, dinitroaniline, hydroxyaniline, phenylenediamine, anisidine, dimethoxyaniline, trimethoxyaniline, ethoxyaniline, diethoxyaniline, triethoxyaniline, n-propoxyaniline, isopropoxyaniline, n-butoxyaniline, sec-butoxyaniline, isobutoxyaniline, t-butoxyaniline, phenoxyaniline, methylaniline, ethylaniline, n-propylaniline, isopropylaniline, n-butylaniline, sec-butylaniline, isobutylaniline, t-butylaniline, dimethylaniline, diethylaniline, di-n- propylaniline, diisopropylaniline, di-n-butylaniline, di-sec-butylaniline, diisobutylaniline, di-t- butylaniline, trimethylaniline, triethylaniline, diisopropylaniline, phenylaniline, benzylaniline, aminobenzoic acid, methyl aminobenzoate, ethyl aminobenzoate, n-propyl aminobenzoate, isopropyl aminobenzoate, n-butyl aminobenzoate, isobutyl aminobenzoate, sec-butyl

aminobenzoate and t-butyl aminobenzoate, and other primary amines including naphthylamine, naphthylmethylamine, benzylamine, propylamine, butylamine, pentylamine, hexylamine, cyclohexylamine, heptylamine, octylamine, 2-aminopyridine, 3-aminopyridine and 4- aminopyridine;

[0206]

secondary amines such as N-methylaniline, N-ethylaniline, diphenylamine, N- methylchloroaniline, N-methylbromoaniline, N-methylfluoroaniline, N-methylanisidine, N- methylmethylaniline, N-methylethylaniline, N-methyl-n-propylaniline, N- methylisopropylaniline, diethylamine, dipropylamine, diisopropylamine, dipentylamine, dihexylamine, dicyclohexylamine, diheptylamine, dioctylamine, morpholine, piperidine, 2,2,6,6- tetramethylpiperidine, pyrrolidine, 2-methylamino pyridine, 3-methylaminopyridine and 4- methylaminopyridine; and

[0207]

tertiary amines such as N,N-dimethylaniline, Ν,Ν-dimethylchloroaniline, N,N- dimethylbromoaniline, N,N-dimethylfluoroaniline, Ν,Ν-dimethylanisidine, N,N- dimethylethylaniline, N,N-dimethyl-n-propylaniline, N,N-dimethylisopropylaniline, 1,4- diazabicyclo[2.2.2]octane, l,5-diazabicyclo[4.3.0]non-5-ene, l,8-diazabicyclo[5.4.0]undec-7- ene, 2-dimethylaminopyridine, 3-dimethylaminopyridine, 4-dimethylaminopyridine,

trimethylamine, triethylamine, tri-n-propylamine, tri-n-butylamine, diisopropylethylamine, tri-n- octylamine, tri-n-decylamine and triphenylamine. Preferably primary or secondary amines, more preferably primary amines are used.

[0208]

The amount of such an amine compound used is usually in the range of 0.001- to 2-fold by mol, preferably 0.01- to 0.5-fold by mol, with respect to the base. The reaction is usually performed in a solvent inert to the reaction. Examples of such a solvent include aprotic solvents such as: aromatic hydrocarbyl solvents such as benzene, toluene and xylene; aliphatic hydrocarbyl solvents such as pentane, hexane, heptane, octane and cyclohexane; ether solvents such as diethyl ether, methyl t-butyl ether, tetrahydrofuran and 1,4-dioxane; amide solvents such as hexamethylphosphoric amide, dimethylformamide, dimethylacetamide and N- methylpyrrolidone; and halogen solvents such as chlorobenzene and dichlorobenzene. These solvents are used alone or as a mixture of two or more thereof, and the amount thereof used is usually in the range of 1- to 200-fold by weight, preferably 3- to 30-fold by weight, with respect to each cyclopentadiene.

[0209]

For the reaction, for example, the substituted cyclopentadiene compound (10), the base and the amine compound may be mixed simultaneously in a solvent, or the base and the amine compound are mixed in advance and then the substituted cyclopentadiene compound (10) may be added to the mixture. The reaction temperature is not particularly limited, and a temperature region that eliminates the need of low temperature equipment is industrially preferable and is, for example, in the range of from 0 to 70°C, preferably from 10 to 60°C. This reaction efficiently produces a metal salt of the substituted cyclopentadiene compound (10). The metal salt of the substituted cyclopentadiene compound (10) thus obtained may be used directly in the form of the reaction mixture or may be taken from the reaction mixture. The former case usually suffices.

[0210]

The reaction for obtaining the substituted cyclopentadiene compound (8-1) is usually performed in a solvent inert to the reaction. Examples of such a solvent include aprotic solvents such as: aromatic hydrocarbyl solvents such as benzene, toluene and xylene; aliphatic hydrocarbyl solvents such as pentane, hexane, heptane, octane and cyclohexane; ether solvents such as diethyl ether, methyl t-butyl ether, tetrahydrofuran and 1,4-dioxane; amide solvents such as hexamethylphosphoric amide, dimethylformamide, dimethylacetamide and N- methylpyrrolidone; and halogen solvents such as chlorobenzene and dichlorobenzene. These solvents are used alone or as a mixture of two or more thereof, and the amount thereof used is usually in the range of 1- to 200-fold by weight, preferably 3- to 30-fold by weight, with respect to the substituted cyclopentadiene compound (10). This reaction is usually performed, for example, by mixing the base, the amine compound and the substituted cyclopentadiene compound (10) in a solvent and then adding the halogenated silyl compound (11-1) to the mixture. However, even when a method is adopted in which these components are mixed simultaneously, the substituted cyclopentadiene compound (8-1) of interest is produced. The reaction temperature is not particularly limited, and a temperature region that eliminates the need of low temperature equipment is industrially advantageous and is, for example, in the range of 0 to 70°C, preferably 10 to 60°C.

[0211]

The amount of the substituted cyclopentadiene compound (10) used is usually in the range of 0.5- to 5-fold by mol, preferably 0.8- to 3-fold by mol, with respect to the halogenated silyl compound (11-1).

[0212]

After completion of the reaction, water, an aqueous sodium bicarbonate solution, an aqueous sodium carbonate solution, an aqueous ammonium chloride solution or an aqueous solution of hydrochloric acid or the like is added to the obtained reaction mixture. Then, organic and aqueous layers are separated to obtain a solution of the substituted cyclopentadiene compound (8-1) as the organic layer. When a water-compatible solvent is used in the reaction or when the amount of the solvent used in the reaction is too small to easily separate organic and aqueous layers, a water-insoluble organic solvent such as toluene, ethyl acetate or chlorobenzene may be added to the reaction mixture as appropriate, followed by separation into organic and aqueous layers. The obtained organic layer is concentrated to obtain the substituted

cyclopentadiene compound (8-1). The obtained substituted cyclopentadiene compound (8-1) may be purified, if necessary, by a method such as distillation and column chromatography treatment.

[0213]

The catalyst for trimerization of the present invention is a catalyst for trimerization comprising the transition metal ion complex (1-1), (1-2) or (1-3). These transition metal ion complexes can be used as catalysts for ethylene trimerization without being brought into contact with an additional activating co-catalyst component.

[0214]

The method for producing 1-hexene according to the present invention is a method for producing 1-hexene from ethylene and is a method for producing 1-hexene by trimerizing ethylene in the presence of the catalyst for trimerization.

[0215]

When the transition metal ion complex (1-1), (1-2) or (1-3) of the present invention is used as a catalyst for trimerization in the production of 1-hexene, water in a reactor for performing trimerization reaction is preferably removed. For this removal of water in a reactor, a compound (A) shown below can be used. Preferably, 1-hexene is produced by trimerizing ethylene in the presence of the catalyst for trimerization and the compound (A) .

[0216]

compound (A), an organic aluminum compound represented by formula

(E¹)_aAl(G)_3-a, wherein

E¹ represents a hydrocarbyl group having 1 to 8 carbon atoms; G represents a hydrogen atom or a halogen atom; a represents an integer of 1 to 3; in the case that more than one E^l moieties exist, the E¹ moieties may be the same as or different from each other; and in the case that more than one G moieties exist, the G moieties may be the same as or different from each other.

[0217]

In the compound (A), examples of the hydrocarbyl group having 1 to 8 carbon atoms in E¹, include alkyl groups having 1 to 8 carbon atoms. Examples of the alkyl groups having 1 to 8 carbon atoms include methyl, ethyl, normal propyl, isopropyl, normal butyl, isobutyl, normal pentyl and neopentyl groups. [0218]

Examples of the organic aluminum compound (A) represented by formula (E^I)_aAl(G)3-a include trialkylaluminum, dialkylaluminum chloride, alkylaluminum dichloride and dialkylaluminum hydride. Examples of the trialkylaluminum include trimethylaluminum, triethylaluminum, tripropylaluminum, triisobutylaluminum and trihexylaluminum. Examples of the dialkylaluminum chloride include dimethylaluminum chloride, diethylaluminum chloride, dipropylaluminum chloride, diisobutylaluminum chloride and dihexylaluminum chloride.

Examples of the alkylaluminum dichloride include methylaluminum dichloride, ethylaluminum dichloride, propylaluminum dichloride, isobutyl aluminum dichloride and hexyl aluminum dichloride. Examples of the dialkylaluminum hydride include dimethylaluminum hydride, diethylaluminum hydride, dipropylaluminum hydride, diisobutylaluminum hydride and dihexylaluminum hydride.

[0219]

When the transition metal ion complex (1-1), (1-2) or (1-3) is used in a solution state, the concentration of the transition metal ion complex is usually 0.0001 to 5 mmol/L, preferably 0.001 to 1 mmol/L. The concentration of the compound (A) is usually 0.01 to 500 mmol L, preferably 0.1 to 100 mmol/L, in terms of the aluminum atom.

[0220]

The tnmerization reaction of ethylene is not particularly limited and may be, for example, trimerization reaction using aliphatic hydrocarbyl (e.g., butane, pentane, hexane, heptane and octane), aromatic hydrocarbyl (e.g., benzene and toluene) or halogenated hydrocarbyl (e.g., methylene dichloride and chlorobenzene) as a solvent, trimerization reaction in a slurry state, or trimerization reaction in ethylene in a gas state.

[0221]

The trimerization reaction can be performed by any of batch, semi-continuous and continuous methods.

[0222]

The pressure of ethylene in the trimerization reaction is usually in the range of normal pressure to 10 MPa, preferably in the range of normal pressure to 5 MPa.

[0223]

The temperature of the trimerization reaction can usually be in the range of from - 50°C to +220°C and is preferably in the range of from 0°C to 170°C, more preferably in the range of from 50°C to 120°C.

[0224] The time of the trimerization reaction can generally be determined appropriately according to the reaction apparatus of interest and can be in the range of 1 minute to 20 hours.

[Examples]

[0225]

The present invention will be described by way of Examples and Comparative

Examples below.

Physical properties were measured by the following methods.

(1) Proton nuclear magnetic resonance spectrum ^H-NMR)

Apparatus: DPX300 manufactured by Bruker BioSpin.

Sample cell: Tube (5 mm in diameter)

Measurement solvent: CDC1₃ or CD Cl₂

Sample concentration: about 10 mg 0.5 mL

Measurement temperature: Room temperature (about 25°C)

Measurement parameter: Probe (5 mm in diameter), OBNUC ¾ PULPROG zg30, accumulated number 16 times or more

Repeat time: ACQTM 2.7 seconds, PD 1 second

Internal standard: CDC1₃ (7.26 ppm) or CD₂C1₂ (5.32 ppm)

[0226]

(2) Carbon nuclear magnetic resonance spectrum (^BC-NMR)

Apparatus: DPX300 manufactured by Bruker BioSpin.

Sample cell: Tube (5 mm in diameter)

Measurement solvent: CDC1₃ or CD₂C1₂

Sample concentration: about 10 mg/0.5 mL

Measurement temperature: Room temperature (about 25°C)

Measurement parameter: Probe (5 mm in diameter), OBNUC ¹³C, PULPROG zgpg30, accumulated number 256 times or more

Repeat time: ACQTM 1.36 seconds, PD 2 seconds

Internal standard: CDC1₃ (77.0 ppm) or CD₂C1₂ (53.8 ppm)

[0227]

(3) Mass spectrum

[Electron ionization mass spectrometry (EI-MS)]

Apparatus: JMS-T100GC manufactured by JEOL Ltd. Ionization voltage: 70 eV

Ion source temperature: 230°C

Acceleration voltage: 7 kV

MASS RANGE: m/z 35-800

[0228]

[Reference Example 1]

[0229]

"Synthesis of l-tris(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene"

[0230]

Under a nitrogen atmosphere, sodium hydride (0.49 g, 20.45 mmol in terms of sodium hydride) dispersed in mineral oil and tetrahydrofuran (23 mL) were mixed. This mixture was heated to 50°C and aniline (0.13 g, 1.36 mmol) was added and stirred at 50°C for one hour. To this, a solution of l,2,3,4-tetramethylcyclopenta-l,3-diene (1.83 g, 15.00 mmol) in tetrahydrofuran (6 mL) was added dropwise and stirred at 50°C for 3.5 hours. This was cooled to 0°C. To this solution, a solution dissolving chlorotris(3,5-dimethylphenyl)silane (5.17 g, 13.64 mmol) dissolved in toluene (6 mL) was added dropwise and stirred at room temperature for 3 hours, and thereafter, stirred at 50°C for 22 hours. The resultant mixture was added dropwise at 0°C to a 10% aqueous sodium carbonate solution (40 mL). Toluene (50 mL) was added to separate an organic phase, and the organic phase was washed with water (50 mL) twice and further washed with saturated brine (50 mL). The organic phase was dried over sodium sulfate and then filtrated. The solvent was removed under reduced pressure. After purification was performed by silica gel column chromatography, hexane of 50°C was added to the resultant solid, and insoluble materials were removed by filtration. The solvent was removed under reduced pressure. The resultant solid was washed with a small amount of hexane and then dried under reduced pressure to obtain l-tris(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene (1.49 g, yield 23.4%).

¹ H-NMR (CDC1₃ , δ ppm): 1.54 (s, 6H), 1.60 (s, 6H), 2.27 (s, 18H), 3.73 (s, 1H), 6.98 (s, 3H), 7.17 (s, 6H)

Mass Spec (EI-MS, m/z): 464 (M⁺ )

[0231]

[Reference Example 2]

"Synthesis of [l-tris(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride" [0232]

Under a nitrogen atmosphere, to a toluene solution (20 mL) of l-tris(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene (0.93 g, 2.00 mmol) and triethylamine (1.01 g, 10.00 mmol), a 1.67 M hexane solution of n-butyllithium (1.32 mL, 2.20 mmol) was added dropwise at -78°C. After the mixture was gradually warmed to room temperature, stirring was performed at room temperature for 5 hours. The resultant mixture was cooled to - 78°C and a solution of titanium tetrachloride (0.42 g, 2.20 mmol) dissolved in toluene (2 mL) was added dropwise at the same temperature. After the mixture was gradually warmed to room temperature, stirring was performed at room temperature overnight. After completion of the reaction, the solvent was removed under reduced pressure. Thereafter, the residue, to which heptane was added, was filtrated to remove insoluble materials. The solvent was removed under reduced pressure to obtain a mixture of [l-tris(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride and 2,2'-bis{tris(3,5-dimethylphenyl)silyl}- l ^^'^^'^^'-octamethyl-S^'-bi-l^-cyclopentadienyl as orange solids. Furthermore, the resultant mixture, to which diethyl ether was added, was filtrated to remove insoluble materials. The solvent was removed from the filtrate under reduced pressure. Pentane was added and the mixture was cooled to -20°C. The resultant solid was filtrated, washed with a small amount of pentane, and then dried under reduced pressure to obtain [l-tris(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienylJtitanium trichloride (0.03 g, yield 2.7%) as an orange solid. ¹ H-NMR (CDC1₃ , δ ppm): 2.03 (s, 6H), 2.27 (s, 18H), 2.36 (s, 6H), 7.06 (s, 3H), 7.20 (s, 6H) ^{1 3} C- MR (CDCI₃ , δ ppm): 14.52, 17.83, 21.41, 131.63, 132.93, 134.60, 137.03, 142.26, 146.34 Mass Spec (EI-MS, m/z): 616 (M⁺ )

[0233]

[Reference Example 3]

"Synthesis of [l-tris(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium"

[0234]

Under a nitrogen atmosphere, to a diethyl ether solution (5 mL) of [l-tris(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride (87.0 mg, 0.14 mmol), a 3.00 M tetrahydrofuran solution of methylmagnesium chloride (0.23 mL, 0.70 mmol) was added dropwise at -20°C. The mixture was gradually warmed to room temperature while stirring. After completion of the reaction, the solvent was removed under reduced pressure. Thereafter, hexane was added to the residue, and insoluble materials were removed by filtration. The solvent was removed from the filtrate under reduced pressure. The resultant solid was dried under reduced pressure to obtain [l-tris(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium(57.3 mg, yield 73.1%) as a light yellow solid. ¹ H-NMR (CD₂ Cl₂ , δ ppm): 0.95 (s, 9H), 1.60 (s, 6H), 1.95 (s, 6H), 2.26 (s, 18H), 7.02 (s, 3H), 7.11 (s, 6H)

1³ C-NMR (CD₂ Cl₂ , 6 ppm): 12.47, 15.53, 21.47, 63.32, 117.74, 129.08, 130.62, 131.25, 134.77, 135.68, 137.15

[0235]

[Reference Example 4]

"Synthesis of l-methylbis(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene"

Under a nitrogen atmosphere, sodium hydride dispersed in mineral oil was washed with hexane to remove the mineral oil. Thereafter, the resultant sodium hydride (0.66 g, 27.27 mmol) and tetrahydrofuran (31 mL) were mixed. This mixture was warmed to 50°C and aniline (0.17 g, 1.82 mmol) was added and stirred at 50°C for one hour. To this, a solution of l,2,3,4-tetramethylcyclopenta-l,3-diene (2.44 g, 20.00 mmol) dissolved in tetrahydrofuran (8 mL) was added dropwise and stirred at 50°C for 3 hours. This was cooled to 0°C. To this solution, a solution of chloromethylbis(3,5-dimethylphenyl)silane (5.25 g, 18.18 mmol) dissolved in toluene (8 mL) was added dropwise and stirred at room temperature for 5 hours. The resultant mixture was added dropwise at 0°C to a 10% aqueous sodium carbonate solution (50 ml). Toluene (50 mL) was added to separate an organic phase, and the organic phase was washed with water (50 mL) twice, and further washed with saturated brine (50 mL). The organic phase was dried over sodium sulfate and then filtrated. The solvent was removed under reduced pressure. Purification was performed by silica gel column chromatography to obtain 1- methylbis(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene (5.08 g, yield 74.6%). ¹ H-NMR (CDC1₃ , δ ppm): 0.30 (s, 3H), 1.54 (s, 6H), 1.74 (s, 6H), 2.29 (s, 12H), 3.40 (s, 1H), 6.97 (s, 2H), 7.10 (s, 4H)

Mass Spec (EI-MS, m/z): 374 (M" )

[0236]

[Reference Example 5]

"Synthesis of [l-methylbis(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride"

Under a nitrogen atmosphere, to a toluene solution (39 mL) of l-methylbis(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene (1.87 g, 5.00 mmol) and triethylamine (2.53 g, 25.00 mmol), a 1.65 M hexane solution of n-butyllithium (3.64 mL, 6.00 mmol) was added dropwise at -78°C. After the mixture was gradually warmed to room temperature, stirring was performed at 40°C for 6.5 hours. The resultant mixture was cooled to -78°C and a solution of titanium tetrachloride (1.04 g, 5.50 mmol) dissolved in toluene (6 mL) was added dropwise at the same temperature. After the mixture was gradually warmed to room

temperature, stirring was performed at room temperature overnight. After completion of the reaction, the solvent was removed under reduced pressure. Thereafter, heptane was added to the residue, and insoluble materials were removed by filtration. The solvent was removed from the filtrate under reduced pressure. Pentane was added and the resultant solid was filtrated, washed with a small amount of pentane, and then dried under reduced pressure to obtain [1- methylbis(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride (0.34 g, yield 12.9%) as an orange solid.

¹ H-NMR (CDC1₃ , δ ppm): 1.06 (s, 3H), 2.13 (s, 6H), 2.28 (s, 12H), 2.34 (s, 6H), 7.06 (s, 6H) ^{1 3} C-NMR (CDCI₃ , δ ppm): -0.76, 14.32, 17.76, 21.39, 131.61, 133.04, 134.85, 137.29, 138.77, 142.28, 145.27

Mass Spec (EI-MS, m/z): 526 (M^" )

[0237]

[Reference Example 6]

"Synthesis of [l-methylbis(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium"

[0238]

Under a nitrogen atmosphere, to a diethyl ether solution (11 mL) of [1- methylbis(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride (227.2 mg, 0.43 mmol), a 3.00 M diethyl ether solution of methylmagnesium iodide (0.72 mL, 2.15 mmol) was added dropwise at -20°C. The mixture was gradually warmed to room temperature while stirring. After completion of the reaction, the solvent was removed under reduced pressure. Thereafter, hexane was added to the residue, and insoluble materials were removed by filtration. The solvent was removed from the filtrate under reduced pressure. The resultant solid was dried under reduced pressure to obtain [l-methylbis(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium (173.8 mg, yield 86.6%) as a light yellow solid.

¹ H-NMR (CD₂ Cl₂ , δ ppm): 0.73 (s, 3H), 0.90 (s, 9H), 1.73 (s, 6H), 1.93 (s, 6H), 2.27 (s, 12H), 7.01 (s, 2H), 7.07 (s, 4H) ^{1 3} C- MR (CD₂ Cl₂ , 5 ppm): -0.54, 12.36, 15.36, 21.45, 62.78, 119.69, 128.94, 129.18, 131.10,

133.30, 137.29, 137.74

[0239]

[Reference Example 7]

[0240]

"Synthesis of l-dimethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene"

Under a nitrogen atmosphere, sodium hydride dispersed in mineral oil was washed with hexane to remove the mineral oil. Thereafter, the resultant sodium hydride (0.96 g, 40.00 mmol) and tetrahydrofuran (43 mL) were mixed. This mixture was warmed to 50°C and aniline (0.25 g, 2.67 mmol) was added and stirred at 50°C for 1.5 hours. To this, a solution of l,2,3,4-tetramethylcyclopenta-l,3-diene (3.42 g, 28.00 mmol) dissolved in tetrahydrofuran (11 mL) was added dropwise and stirred at 50°C for 2 hours. This was cooled to 0°C. To this solution, a solution of chlorodimethyl(3,5-dimethylphenyl)silane (5.30 g, 26.67 mmol) dissolved in toluene (11 mL) was added dropwise and stirred at room temperature overnight. The resultant mixture was added dropwise at 0°C to a 10% aqueous sodium carbonate solution (56 ml). Toluene (80 mL) was added to separate an organic phase, and the organic phase was washed with water (80 mL) twice, and further washed with saturated brine (50 mL). The organic phase was dried over sodium sulfate and then filtrated. The solvent was concentrated under reduced pressure to obtain l-dimethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadiene (6.60 g, yield 87.0%).

1H-NMR (CDC1₃ , 5 ppm): 0.14 (s, 6H), 1.72 (s, 6H), 1.76 (s, 6H), 2.31 (s, 6H), 3.06 (s, 1H), 6.98 (s, 1H), 7.07 (s, 2H)

Mass Spec (EI-MS, m/z): 284 (M⁺ )

[0241]

[Reference Example 8]

[0242]

" Synthesis of [ 1 -dimethy 1(3 , 5 -dimethylpheny l)sily 1-2, 3,4,5- tetramethylcyclopentadienyl]titanium trichloride"

Under a nitrogen atmosphere, to a toluene solution (53 mL) of 1 -dimethy 1(3, 5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadiene (1.99 g, 7.00 mmol) and triethylamine (3.54 g, 35.00 mmol), a 1.65 M hexane solution of n-butyllithium (5.09 mL, 8.40 mmol) was added dropwise at -78°C. After the mixture was gradually warmed to room temperature, stirring was performed at room temperature for 3 hours. The resultant mixture was cooled to - 78°C and a solution of titanium tetrachloride (1.46 g, 7.70 mmol) dissolved in toluene (8 mL) was added dropwise at the same temperature. After the mixture was gradually warmed to room temperature, stirring was performed at room temperature overnight. After completion of the reaction, the solvent was removed under reduced pressure. Thereafter, heptane was added to the residue, and insoluble materials were removed by filtration. The solvent was removed from the filtrate under reduced pressure. Pentane was added and cooling to -20°C was performed. The resultant solid was filtrated, washed with a small amount of pentane, and then dried under reduced pressure to obtain [l-dimethyl(3,5-dimethylphenyt)silyl-2,3,4,5- tetramethylcyclopentadienyljtitanium trichloride (0.49 g, yield 16.0%) as an orange solid.

1 H-NMR (CDC1₃ , 5 ppm): 0.74 (s, 6H), 2.30 (s, 6H), 2.33 (s, 6H), 2.41 (s, 6H), 7.02 (s, 1H), 7.06 (s, 2H)

^{1 3} C-NMR (CDCl₃ , 5 ppm): 0.41, 14.38, 17.85, 21.53, 131.51, 131.82, 137.18, 137.54, 139.47, 142.33, 145.10

Mass Spec (EI-MS, m/z): 436 (]VT )

[0243]

[Reference Example 9]

"Synthesis of [l-dimethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyljtrimethyltitanium"

[0244]

Under a nitrogen atmosphere, to a diethyl ether solution (11 mL) of [1- dimethyl(3,5-dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride (210 mg, 0.48 mmol), a 3.00 M diethyl ether solution of methylmagnesium iodide (0.80 mL, 2.40 mmol) was added dropwise at -20°C. The mixture was gradually warmed to room temperature while stirring. After completion of the reaction, the solvent was removed under reduced pressure. Thereafter, pentane was added to the residue, and insoluble materials were removed by filtration. The solvent was removed from the filtrate under reduced pressure. The resultant solid was dried under reduced pressure to obtain [l-dimethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium (165.4 mg, yield 91.6%) as a light yellow solid. ¹ H-NMR (CD₂ Cl₂ , δ ppm): 0.48 (s, 6H), 0.89 (s, 9H), 1.93 (s, 6H), 1.98 (s, 6H), 2.28 (s, 6H), 6.98 (s, 1H), 7.09 (s, 2H)

^{1 3} C-NMR (CD₂ C1₂ , 6 ppm): 0.02, 11.59, 14.50, 20.77, 61.55, 127.96, 128.63, 130.16, 131.26, 136.68, 139.26 [0245]

[Reference Example 10]

"Synthesis of chlorotris(5-methyl-3-trimethylsilyl-phenyl)silane" Under a nitrogen atmosphere, 5-methyl-3-trimethylsilyl-l-bromobenzene (20.06 g, 82.49 mmol) and diethyl ether (200 mL) were mixed. The resultant mixture was cooled to - 78°C and a 1.65 M hexane solution of n-butyllithium (50.00 mL, 82.49 mmol) was added dropwise. After the mixture was warmed to 0°C, stirring was performed at this temperature for 3 hours. The resultant mixture was added at -78°C to a solution of tetrachlorosilane (4.45 g, 26.19 mmol) dissolved in diethyl ether (44 mL). After stirring was performed at -78°C for 10 minutes, the mixture was gradually warmed to room temperature. After completion of the reaction, the solvent was removed under reduced pressure. Thereafter, hexane was added to the residue, and hexane-insoluble parts was removed by filtration through celite. The solvent was removed from the filtrate under reduced pressure to obtain chlorotris(5-methyl-3-trimethylsilyl- phenyl)silane (13.10 g, yield 90.4%) as a light yellow oil.

1 H-NMR (CDC1₃ , δ ppm): 0.24 (s, 27H), 2.37 (s, 9H), 7.45 (s, 3H), 7.48 (s, 3H), 7.64 (s, 3H) ^{1 3} C-NMR (CDC1₃ , δ ppm): -0.98, 21.72, 132.25, 136.41, 136.49, 136.62, 137.37, 139.94 Mass Spec (EI-MS, m/z): 552 (IV )

[0246]

[Reference Example 11]

"Synthesis of l-tris(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethy lcyclopentadiene "

Under a nitrogen atmosphere, potassium hydride (0.88 g, 21.82 mmol in terms of potassium hydride) dispersed in mineral oil was washed with hexane. Tetrahydrofuran (38 mL) was added and this mixture was warmed to 50°C. A solution of 1,2,3,4-tetramethylcyclopenta- 1,3-diene (2.00 g, 16.37 mmol) dissolved in tetrahydrofuran (8 mL) was added dropwise and stirred at 50°C for one hour. To this solution, a solution of chlorotris(5-methyl-3-trimethylsilyl- phenyl)silane (7.81 g, 14.11 mmol) dissolved in tetrahydrofuran (38 mL) was added dropwise and stirred at 65°C for 3 hours. The resultant mixture was added dropwise at 0°C to a solution of a 10% sodium hydrogen carbonate (38 mL) and a 10% sodium carbonate (38 mL). Toluene (38 mL) was added to separate an organic phase, and the organic phase was dried over sodium sulfate and then filtrated. The solvent was removed under reduced pressure. Purification was performed by silica gel column chromatography to obtain l-tris(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadiene (5.40 g, yield 59.9%). ¹ H-NMR (CDCb , δ ppm): 0.22 (s, 27H), 1.53 (s, 6H), 1.56 (s, 6H), 2.29 (s, 9H), 3.78 (s, 1H),

7.31 (s, 3H), 7.37 (s, 3H), 7.63 (s, 3H)

^{1 3} C- MR (CDC , 5 ppm): -0.90, 11.25, 15.05, 21.77, 51.38, 133.22, 133.52, 134.83, 135.65, 136.92, 136.99, 138.06, 138.79

Mass Spec (EI-MS, m/z): 638 (IV )

[0247]

[Reference Example 12]

"Synthesis of [ 1 -tris(5 -methyl-3 -trimethylsilyl-phenyl)silyl-2,3 ,4, 5- tetramethylcyclopentadienyl]titanium triisopropoxide"

[0248]

Under a nitrogen atmosphere, potassium hydride dispersed in mineral oil was washed with hexane to remove the mineral oil. Thereafter, the resultant potassium hydride (0.29 g, 7.24 mmol) and tetrahydrofuran (36 mL) were mixed. This mixture was warmed to 50°C and a solution of l-tris(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadiene (3.56 g, 5.57 mmol) dissolved in tetrahydrofuran (19 mL) was added dropwise and stirred at 50°C for 6 hours. The resultant mixture was cooled to room

temperature and insoluble materials were removed by filtration. The resultant filtrate was cooled to -78°C and a solution of chlorotriisopropoxytitanium (1.45 g, 5.57 mmol) dissolved in tetrahydrofuran (10 mL) was added dropwise at the same temperature. After the mixture was gradually warmed to room temperature, stirring was performed at room temperature overnight. After completion of the reaction, the solvent was removed under reduced pressure. Thereafter, pentane was added to the residue, and insoluble materials were removed by filtration. The solvent was removed from the filtrate under reduced pressure to quantitatively obtain [l-tris(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium

triisopropoxide as a light yellow solid.

¹ H-NMR (CDCI₃ , δ ppm): 0.14 (s, 27H), 1.08 (d, J=6.2Hz, 18H), 1.67 (s, 6H), 1.98 (s, 6H),

2.32 (s, 9H), 4.50 (quin, J=6.2Hz, 3H), 7.29 (s, 3H), 7.37 (s, 3H), 7.62 (s, 3H)

^{1 3} C-NMR (CDCI₃ , 5 ppm): -1.12, 11.62, 15.03, 21.70, 26.52, 75.66, 112.59, 126.69, 131.28, 134.41, 135.28, 135.52, 138.17, 138.94

Mass Spec (EI-MS, m/z): 862 (M⁺ )

[0249]

[Reference Example 13]

"Synthesis of [l-tris(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]titanium trichloride"

Under a nitrogen atmosphere, to a toluene solution (96 mL) of [l-tris(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium triisopropoxide (4.81 g, 5.57 mmol), a solution of silicon tetrachloride (9.47 g, 55.71 mmol) dissolved in toluene (56 mL) was added dropwise at 0°C. After the mixture was gradually warmed to room temperature, stirring was performed at room temperature for 3 hours. After completion of the reaction, the solvent was concentrated under reduced pressure. Thereafter, heptane was added to the residue, and insoluble materials were removed by filtration. The solvent was removed from the filtrate under reduced pressure, and recrystallization from pentane gave [l-tris(5-methyl-3- trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride (1.07 g, yield 24.4%) as an orange solid.

¹ H-NMR (CDC1₃ , δ ppm): 0.19 (s, 27H), 2.02 (s, 6H), 2.30 (s, 9H), 2.35 (s, 6H), 7.38 (s, 3H), 7.41 (s, 3H), 7.59 (s, 3H)

^{1 3} C-NMR (CDC1₃ , 6 ppm): -1.17, 14.32, 17.63, 21.61, 131.94, 135.51, 136.11, 137.05, 137.78, 139.21, 139.44, 142.43, 145.83

Mass Spec (EI-MS, m/z): 792 (M )

[0250]

[Reference Example 14]

"Synthesis of [l-tris(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium"

[0251]

Under a nitrogen atmosphere, to a diethyl ether solution (22 mL) of [l-tris(5- methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]titanium trichloride (446 mg, 0.56 mmol), a 3.00 M diethyl ether solution of methylmagnesium iodide (0.94 mL, 2.81 mmol) was added dropwise at -20°C. The mixture was gradually warmed to room temperature while stirring. After completion of the reaction, the solvent was removed under reduced pressure. Thereafter, hexane was added to the residue, and insoluble materials were removed by filtration. The solvent was removed from the filtrate under reduced pressure.

Recrystallization from pentane gave [l-tris(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl]trimethyltitanium (370 mg, yield 89.9%) as a light yellow solid. ¹ H-NMR (CD₂ Cl₂ , δ ppm): 0.19 (s, 27H), 0.94 (s, 9H), 1.58 (s, 6H), 1.95 (s, 6H), 2.28 (s, 9H), 7.35 (s, 6H), 7.50 (s, 3H)

^{1 3} C-NMR (CD₂ C1₂ , 6 ppm): -1.05, 12.38, 15.39, 21.68, 63.59, 118.06, 129.34, 130.47, 134.76, 135.29, 136.29, 138.09, 139.40 [0252]

Physical properties were measured by the following methods.

(1) Proton nuclear magnetic resonance spectrum (^lH-NMR)

Apparatus: DPX300 manufactured by Bruker BioSpin

Sample cell: Tube (5 mm in diameter)

Measurement solvent: Ortho-dichlorobenzene-d₄ or bromobenzene-d₅

Sample concentration: about 10 mg/0.5 mL

Measurement temperature: Room temperature (about 25°C)

Repeat time: ACQTM 2.7 seconds, PD 1 second

Internal standard: Proton signals of 3,6-positions of ortho-dichlorobenzene (7.40 ppm) or 4,5- positions of ortho-dichlorobenzene (7.14 ppm) or low-magnetic field signal of bromobenzene (7.28 ppm)

[0253]

[Example 1]

"Synthesis of [{ l-tris(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate] (hereinafter, referred to as "ion complex 1")"

[0254]

Under a nitrogen atmosphere, to a solution of [l-tris(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium(30.5 mg, 54.8 μπιοΐ) in bromobenzene (0.5 mL), a solution of triphenylmethyl tetrakis(pentafluorophenyl)borate (50.5 mg, 54.8 μηιοΐ) dissolved in bromobenzene (0.5 mL) was added dropwise. From the resultant orange mixture, insoluble materials were removed by filtration. The mixture was cooled to -20°C to precipitate a solid. Hexane was added and the supernatant was removed. This operation was repeated three times. The resultant solid was dried under reduced pressure to obtain ion complex 1 (48.6 mg, yield 72.6%) as an orange solid.

1 H-NMR (ortho-dichlorobenzene-d₄ , δ ppm): 0.36 (s, 6H, Ti-Me₂ ), 1.70 (s, 6H), 2.19 (s, 6H), 2.42 (s, 12H), 2.52 (s, 6H), 7.00 (s, 2H), 7.03 (s, 2H), 7.54 (s, 4H), 7.66 (s, 1H)

[0255]

[Example 2]

"Synthesis of ion complex 1 " [0256]

Under a nitrogen atmosphere, to a solution of [l-tris(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium(10.0 mg, 18.0 μηιοΐ) in bromobenzene-d₅ (0.5 mL), triphenyl methyl tetrakis(pentafluorophenyl)borate (16.6 mg, 18.0 μιηοι) was added. The Ti-Me₂ peak of the resultant mixture in the 1H-NMR spectrum showed the quantitative formation of desired ion complex 1.

[0257]

[Example 3]

"Synthesis of ion complex 1"

[0258]

Under a nitrogen atmosphere, to a solution of [l-tris(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium(10.0 mg, 18.0 μηιοΐ) in bromobenzene-d₅ (0.5 mL), dimethylanilinium tetrakis(pentafluorophenyl)borate (14.4 mg, 18.0 μιηοΐ) was added. The Ti-Me₂ peak of the resultant mixture in the 1H-NMR spectrum showed the quantitative formation of desired ion complex 1.

[0259]

[Example 4]

"Synthesis of [{ l-tris(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tris(pentafluorophenyl)methylborate] (hereinafter, referred to as "ion complex 2")"

[0260]

Under a nitrogen atmosphere, to a solution of [l-tris(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium(10.0 mg, 18.0 μιηοΐ) in bromobenzene-ds (0.5 mL), tris(pentafluorophenyl)borane (9.2 mg, 18.0 μιηοΐ) was added. The Ti-Me₂ and B- Me peaks of the resultant mixture in the 1H-NMR spectrum exhibited the quantitative formation of desired ion complex 2. ¹ H-NMR (bromobenzene-ds , δ ppm): 0.35 (s, 6H, Ti-Me₂ ), 1.36 (br s, 3H, B-Me), 1.69 (s, 6H), 2.17 (s, 6H), 2.44 (s, 18H), 6.90-7.20 (m, 3H), 7.56 (s, 6H)

[0261]

[Example 5]

"Synthesis of [{ l-methylbis(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl } dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate]

(hereinafter, referred to as "ion complex 3")"

[0262] Under a nitrogen atmosphere, to a solution of [l-methylbis(3,5- dimethylphenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium (100.0 mg, 0.21 mmol) in bromobenzene (1.7 mL), a solution of triphenylmethyl

tetrakis(pentafluorophenyl)borate (197.7 mg, 0.21 mmol) dissolved in bromobenzene (1.7 mL) was added dropwise. The resultant reddish brown mixture was stirred at room temperature for 10 minutes. Hexane was added and the mixture was cooled to -20°C to precipitate a solid. The resultant solid was filtered, washed with a small amount of pentane, and then dried under reduced pressure to obtain ion complex 3 (180.2 mg, yield 74.4%) as a yellow solid.

1 H-NMR (ortho-dichlorobenzene-d₄ , δ ppm): 0.30 (s, 3H), 0.42 (s, 3H), 0.79 (s, 3H), 1.59 (s, 3H), 1.98 (s, 3H), 2.07 (s, 3H), 2.16 (s, 3H), 2.41 (s, 3H), 2.48 (s, 6H), 2.60 (s, 3H), 6.80 (br s, 2H),7.20 (s, 1H), 7.43 (s, 2H), 7.64 (s, 1H)

[0263]

[Example 6]

"Synthesis of [{l-dimethyl(3,5-dimethylphenyl)silyl-2,3,4,5- tetramethylcyclopentadienyl}dimethyltitanium cation][tetrakis(pentafluorophenyl)borate] (hereinafter, referred to as "ion complex 4")"

[0264]

Under a nitrogen atmosphere, a solution of [l-dimethyl(3,5-dimethylphenyl)silyl- 2,3,4,5-tetramethylcyclopentadienylJtrimethyltitanium (0.165 g, 0.44 mmol) in bromobenzene (2.8 mL), a solution of triphenylmethyl tetrakis(pentafiuorophenyl)borate (0.405 g, 0.44 mmol) dissolved in bromobenzene (2.8 mL) was added dropwise. The resultant reddish brown mixture was stirred at room temperature for 15 minutes. Hexane was added and the mixture was cooled to -20°C to precipitate a solid. Hexane was added and the supernatant was removed. This operation was repeated three times. The resultant solid was filtered, washed with a small amount of pentane, and dried under reduced pressure to obtain ion complex 4 (0.394 g, yield 86.2%) as an ocherous solid.

¹ H-NMR (bromobenzene-ds , δ ppm): 0.05 (s, 6H), 0.32 (s, 6H, Ti-Me₂ ), 1.50 (s, 6H), 1.80 (s, 6H), 2.12 (s, 6H), 6.19 (s, 2H), 7.12 (s, 1H)

[0265]

[Example 7]

"Synthesis of [{ l-tris(5-methyl-3-trimethylsilyl-phenyl)silyl-2,3,4,5- tetramethy lcyclopentadieny 1 } dimethyltitanium cation] [tetrakis(pentafluoropheny l)borate] (hereinafter, referred to as "ion complex 5")"

[0266] Under a nitrogen atmosphere, to a solution of [l-tris(5-methyl-3-trimethylsilyl- phenyl)silyl-2,3,4,5-tetramethylcyclopentadienyl]trimethyltitanium (0.100 g, 0.14 mmol) in bromobenzene (1.7 mL), a solution of triphenylmethyl tetrakis(pentafluorophenyl)borate (0.126 g, 0.14 mmol) dissolved in bromobenzene (1.7 mL) was added dropwise. The resultant reddish brown mixture was stirred at room temperature for 15 minutes. Hexane was added and the mixture was cooled to -20°C. Hexane was added and the supernatant was removed. This operation was repeated three times. The resultant brown oil was dried under reduced pressure to obtain ion complex 5 (0.128 g, yield 67.5%) as an orange solid.

¹ H-NMR (ortho-dichlorobenzene-d₄ , 6 ppm): 0.29 (s, 27H), 0.43 (s, 3H), 0.49 (s, 3H), 1.66 (s, 6H), 1.98 (s, 6H), 2.31 (s, 6H), 2.58 (s, 3H), 6.94-7.75 (m, 9H)

[0267]

(1) Trimerization activity

Trimerization activity was analyzed using gas chromatography (Shimadzu GC- 2010, DB-1 column).

(2) Synthesis of well known transition metal ion complex

{ 1 -(1 -Methyl- 1 -(3 ,5-dimethylphenyl)ethyl)-3- trimethylsilylcyclopentadienyl }dimethyltitanium cation] [tetrakis(pentafluorophenyl)borate] (hereinafter, referred to as "ion complex 6") was synthesized according to a procedure known in the literature (J. Am. Chem. Soc. 2009, 131, 5298-5312.).

¹ H-NMR (ortho-dichlorobenzene-d₄ , δ ppm): 0.40 (s, 9H), 0.78 (s, 3H), 0.79 (s, 3H), 1.46 (s, 3H), 1.47 (s, 3H), 2.46 (s, 3H), 2.52 (s, 3H), 5.87 (br s, 1H), 5.97 (br s, lH), 6.34 (s, 1H), 6.40 (s, 1H), 7.34 (br s, 1H), 7.47 (s, 1H)

[0268]

[Example 8]

An autoclave (0.4 liter) equipped with a stirrer was dried under reduced pressure and purged with argon. Toluene (90 mL) was supplied. After the interior temperature of the system was increased to 80°C, a hexane solution (0.43 mL) of triisobutylaluminum (TIB A) having a concentration of 0.93 mmol/mL was placed and ethylene was further introduced so as to obtain a partial pressure of 0.5 MPa. After temperature and pressure were stabilized, 0.8 μιηοΐ of ion complex 1 was weighed and placed in a solid state in the reactor. A reaction was performed at 80°C for 30 minutes while continuously supplying ethylene gas so as to maintain the whole pressure at a constant value. After ethanol (2 mL) was added to stop the reaction, ethylene was purged and the content of the autoclave was decalcificated with ethanol- hydrochloric acid and subjected to filtration operation. 1-Hexene and polymers were obtained. The trimerization activity was 2.69 x 10⁶ g/mol complex/h and the polymerization activity was 0.07 x 10⁶ g/mol complex/h.

[0269]

[Example 9]

An autoclave (0.4 liter) equipped with a stirrer was dried under reduced pressure and purged with argon. Toluene (90 mL) was supplied. After the interior temperature of the system was increased to 80°C, a hexane solution (0.43 mL) of triisobutylaluminum (TIBA) having a concentration of 0.93 mmol/mL was placed and ethylene was further introduced so as to obtain a partial pressure of 0.5 MPa. After temperature and pressure were stabilized, 1.2 μπιοΐ of ion complex 3 was weighed and placed in a solid state in the reactor. A reaction was performed at 80°C for 30 minutes while continuously supplying ethylene gas so as to maintain the whole pressure at a constant value. After ethanol (2 mL) was added to stop the reaction, ethylene was purged and the content of the autoclave was decalcificated with ethanol- hydrochloric acid and subjected to filtration operation. 1-Hexene and polymers were obtained. The trimerization activity was 5.32 x 10⁶ g/mol complex/h and the polymerization activity was 0.04 x 10⁶ g/mol complex/h.

[0270]

[Example 10]

An autoclave (0.4 liter) equipped with a stirrer was dried under reduced pressure and purged with argon. Toluene (90 mL) was supplied. After the interior temperature of the system was increased to 80°C, a hexane solution (0.43 mL) of triisobutylaluminum (TIBA) having a concentration of 0.93 mmol/mL was placed and ethylene was further introduced so as to obtain a partial pressure of 0.5 MPa. After temperature and pressure were stabilized, 1.9 μι^ηοΐ of ion complex 4 was weighed and placed in a solid state in the reactor. A reaction was performed at 80°C for 30 minutes while continuously supplying ethylene gas so as to maintain the whole pressure at a constant value. After ethanol (2 mL) was added to stop the reaction, ethylene was purged and the content of the autoclave was decalcificated with ethanol- hydrochloric acid and subjected to filtration operation. 1-Hexene and polymers were obtained. The trimerization activity was 2.87 x 10⁶ g/mol complex/h and the polymerization activity was 0.03 x 10⁶ g/mol complex/h.

[0271]

[Example 11] An autoclave (0.4 liter) equipped with a stirrer was dried under reduced pressure and purged with argon. Toluene (90 mL) was supplied. After the interior temperature of the system was increased to 80°C, a hexane solution (0.43 mL) of triisobutylaluminum (TIB A) having a concentration of 0.93 mmol/mL was placed and ethylene was further introduced so as to obtain a partial pressure of 0.5 MPa. After temperature and pressure were stabilized, 3.0 μηιοΐ of ion complex 5 was weighed and placed in a solid state in the reactor. A reaction was performed at 80°C for 30 minutes while continuously supplying ethylene gas so as to maintain the whole pressure at a constant value. After ethanol (2 mL) was added to stop the reaction, ethylene was purged and the content of the autoclave was decalcificated with ethanol- hydrochloric acid and subjected to filtration operation. 1-Hexene and polymers were obtained. The trimerization activity was 1.41 x 10⁶ g/mol complex/h and the polymerization activity was 0.12 x 10⁶ g/mol complex/h.

[0272]

[Comparative Example 1]

An autoclave (0.4 liter) equipped with a stirrer was dried under reduced pressure and purged with argon. Toluene (90 mL) was supplied. After the interior temperature of the system was increased to 80°C, a hexane solution (0.43 mL) of triisobutylaluminum (TIB A) having a concentration of 0.93 mmol mL was placed and ethylene was further introduced so as to obtain a partial pressure of 0.5 MPa. After temperature and pressure were stabilized, 2.6 μπιοΐ of ion complex 6 was weighed and placed in a solid state in the reactor. A reaction was performed at 80°C for 30 minutes while continuously supplying ethylene gas so as to maintain the whole pressure at a constant value. After ethanol (2 mL) was added to stop the reaction, ethylene was purged and the content of the autoclave was decalcificated with ethanol- hydrochloric acid and subjected to filtration operation. 1-Hexene and polymers were obtained. The trimerization activity was 0.25 x 10⁶ g/mol complex/h and the polymerization activity was 0.02 x 10⁶ g/mol complex/h.

Claims

[Claim 1]

n complex represented by formula (1-1), (1-2) or (1-3):

R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, R²¹, X¹ and X² each independently represent

a hydrogen atom, a halogen atom,

an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent,

an alkoxy group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an aryl group having 6 to 20 carbon atoms which may have a halogen atom as a substituent,

an aryloxy group having 6 to 20 carbon atoms which may have a halogen atom as a substituent,

an aralkyl group having 7 to 20 carbon atoms which may have a halogen atom as a substituent,

an aralkyloxy group having 7 to 20 carbon atoms which may have a halogen atom as a substituent,

a substituted silyl group represented by -Si(R²²)₃, wherein the three R²² moieties each independently represent a hydrogen atom, a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the three R²² moieties is 1 to 20, or

a disubstituted amino group represented by -N(R²³)₂, wherein the two R²³ moieties each independently represent a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the two R²³ moieties is 2 to 20, and

R¹⁰ and R¹¹ each independently represent

a hydrogen atom, a halogen atom,

an alkoxy group having 1 to 20 carbon atoms which may have a halogen atom as a substituent,

a substituted silyl group represented by -Si(R²²)₃, wherein the three R²² moieties each independently represent a hydrogen atom, a hydrocarbyl group or a halogenated

hydrocarbyl group, and the total number of the carbon atoms in the three R²² moieties is 1 to 20, or

a disubstituted amino group represented by -N(R²³)₂, wherein the two R²³ moieties each independently represent a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the two R²³ moieties is 2 to 20; or

of R¹, R², R³ and R⁴, two group bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the two carbon atoms to which the two groups are bonded, of R⁵, R⁶, R⁷, R⁸ and R⁹, two group bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the two carbon atoms to which the two groups are bonded, of R¹², R¹³, R¹⁴, R¹⁵ and R¹⁶, two group bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the two carbon atoms to which the two

1 "7 1 ft ί Q 70 71

groups are bonded, of R , R^ls, R , and R , two group bonded to two adjoining carbon atoms may be bonded to each other to form a ring together with the two carbon atoms to which the two groups are bonded, and R¹⁰ and R¹¹ may be bonded to each other to form a ring together with the silicon atom to which R¹⁰ and R¹¹ are bonded.

[Claim 2]

The transition metal ion complex according to claim 1, wherein M is a titanium atom.

[Claim 3]

The transition metal ion complex according to claim 1 or 2, wherein R¹, R², R³ and R⁴ are each a methyl group.

[Claim 4]

The transition metal ion complex according to any one of claims 1 to 3, wherein A is an anion of a boron compound.

[Claim 5]

The transition metal ion complex according to any one of claims 1 to 4, wherein A is tetrakis(pentafluorophenyl)borate.

[Claim 6]

The transition metal ion complex according to any one of claims 1 to 5, wherein R⁶, R⁸, R¹³, R¹⁵, R¹⁸ and R²⁰ are each independently

an alkyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent or

a substituted silyl group represented by -Si(R²²)₃, wherein the three R²² moieties each independently represent a hydrogen atom, a hydrocarbyl group or a halogenated hydrocarbyl group, and the total number of the carbon atoms in the three R²² moieties is 1 to 20.

[Claim 7]

A method for producing a transition metal ion complex represented by formula (1-1) according to claim 1, comprising the step of reacting a transition metal complex

wherein

R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹⁰, R¹¹, X¹, X² and M are as defined above; and

X³ represents

an aryl group having 6 to 20 carbon atoms which may have a halogen atom as a . substituent or

an aralkyl group having 7 to 20 carbon atoms which may have a halogen atom as a substituent

with one or more compounds selected from the compound group consisting of the following compounds (Dl), (D2) and (D3):

(Dl): a compound represented by formula DQ¹Q²Q³,

(D2): a borate compound represented by formula T⁺(DQ⁴Q⁵Q⁶Q⁷)^", and

(D3): a borate compound represented by formula (L-H)⁺(DQ⁸Q⁹Q¹⁰Q¹¹)^", wherein D represents a trivalent boron; Q¹, Q², Q³, Q⁴, Q⁵, Q⁶, Q⁷, Q⁸, Q⁹, Q¹⁰ and Q¹¹ are the same as or different from each other and each independently represent a halogen atom, a hydrocarbyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, a hydrocarbylsilyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an alkoxy group having 1 to 20 carbon atoms which may have a halogen atom as a substituent or a dihydrocarbylamino group having 2 to 20 carbon atoms which may have a halogen atom as a substituent; T⁺ represents an inorganic or organic cation; and (L-H)⁺ represents Broensted acid.

[Claim 8]

A method for producing a transition metal ion complex represented by formula (1-2) according to claim 1, comprising the step of reacting a transition metal complex

wherein

R¹, R², R³, R⁴, R⁵, R⁶, R⁷, R⁸, R⁹, R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, X¹, X² and M are as defined above; and

X³ represents

an aryl group having 6 to 20 carbon atoms which may have a halogen atom as a substituent or

(Dl): a compound represented by formula DQ¹Q²Q³,

(D2): a borate compound represented by formula T⁺(DQ Q⁵Q⁶Q⁷)^", and

(D3): a borate compound represented by formula (L-H)⁺(DQ⁸Q⁹Q¹⁰Qⁿ)^", wherein D represents a trivalent boron; Q¹, Q², Q³, Q⁴, Q⁵, Q⁶, Q⁷, Q⁸, Q⁹, Q¹⁰ and Q¹¹ are the same as or different from each other and each independently represent a halogen atom, a hydrocarbyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, a hydrocarbylsilyl group having 1 to 20 carbon atoms which may have a halogen atom as a substituent, an alkoxy group having 1 to 20 carbon atoms which may have a halogen atom as a substituent or a dihydrocarbylamino group having 2 to 20 carbon atoms which may have a halogen atom as a substituent; T⁺ represents an inorganic or organic cation; and (L-H)⁺ represents Broensted acid.

[Claim 9]

A method for producing a transition metal ion complex represented by formula (1-3) according to claim 1, comprising the step of reacting a transition metal complex represented by formula (2-3):

wherein

p 1 _t>2 p3 p4 p ₅ p6 p 7 _R 8 p9 p 12 p 13 p l4 p 15 p 16 „ 17 _R 18 p 19 _p 20 p21 tv , rv , rv , rv , rv , r\ , rv , rv , iv , rv , K. , rv , rv , rv , rv , rv , rv , rv , rv ,

X¹, X² and M are as defined above; and

X³ represents

(Dl): a compound represented by formula DQ¹Q²Q³,

(D2): a borate compound represented by formula T⁺(DQ Q⁵Q⁶Q⁷)^", and

[Claim 10]

A catalyst for trimerization comprising a transition metal ion complex according to any one of claims 1 to 6.

[Claim 11]

A method for producing 1-hexene, comprising trimerizing ethylene in the presence of a catalyst for trimerization according to claim 10.

[Claim 12]

A method for producing 1-hexene comprising trimerizing ethylene in the presence of a catalyst for trimerization according to claim 10 and the following compound (A):

compound (A): an organic aluminum compound represented by formula

(E¹)_aAl(G)3-a, wherein

E¹ represents a hydrocarbyl group having 1 to 8 carbon atoms; G represents a hydrogen atom or a halogen atom; a represents an integer of 1 to 3; in the case that more than one E¹ moieties exist, the E¹ moieties may be the same as or different from each other; and in the case that more than one G moieties exist, the G moieties may be the same as or different from each other.