Method for producing a titanium complex

Abstract: There is disclosed a method for producing an alkoxytitanium complex of formula ( I ), wherein Cp is a group having cyclopentadiene-type anion skeleton, A represents a carbon atom or silicon atom, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 each independently represent a hydrogen atom, an alkyl group having 1 to 10 carbon atoms which optionally may be substituted and the like, and R 7 each independently represents an alkyl group having 1 to 10 carbon atoms which may be substituted and the like.

Description: The present invention relates to methods for producing an alkoxytitanium complex, aryloxytitanium complex and aminotitanium complex. Complexes of Group IV transition metals such as titanium and zirconium are useful metal complexes used as Lewis acids in valuable reactions in organic synthesis such as transesterification reaction and Diels-Alder reaction. Alkoxytitanium complexes, aryloxytitanium complexes and aminotitanium complexes are promising metal complexes (JP9-87313A), and development of production methods has been desired. An object of the present invention is to provide industrially advantageous methods for producing an alkoxytitanium complex, aryloxytitanium complex and aminotitanium complex. The present invention provides: 1. A method for producing an alkoxytitanium complex represented by the general formula ( I ), wherein Cp is a group having a cyclopentadiene-type anion skeleton, A represents a carbon atom or silicon atom, R 1 , R 2 , R 3 and R 4 each independently represent: a hydrogen atom; a halogen atom; an alkyl group having 1 to 10 carbon atoms which may be substituted by fluorine, an alkoxy group having 1 to 10 carbon atoms which may be substituted by fluorine; an aryl group having 6 to 20 carbon atoms which may be substituted by fluorine; an aryloxy group having 6 to 20 carbon atoms which may be substituted by fluorine; an aralkyl group having 7 to 20 carbon atoms which may be substituted by fluorine; an aralkyloxy group having 7 to 20 carbon atoms which may be substituted by fluorine; a hydrocarbon-substituted silyl group having 1 to 20 carbon atoms; or a hydrocarbon-substituted amino group having 1 to 20 carbon atoms, R 5 and R 6 each independently represent: a hydrogen atom; an alkyl group having 1 to 10 carbon atoms which optionally may be substituted by fluorine; an alkoxy group having 1 to 10 carbon atoms which may be substituted by fluorine; an aryl group having 6 to 20 carbon atoms which may be substituted by fluorine, an aryloxy group having 6 to 20 carbon atoms which may be substituted by fluorine, an aralkyl group having 7 to 20 carbon atoms which may be substituted by fluorine; an aralkyloxy group having 7 to 20 carbon atoms which may be substituted by fluorine; a hydrocarbon-substituted silyl group having 1 to 20 carbon atoms; or a hydrocarbon-substituted amino group having 1 to 20 carbon atoms; and R 7 is the same or different and each independently represent: an alkyl group having 1 to 10 carbon atoms which may be substituted; or an aralkyl group having 7 to 20 carbon atoms which may be substituted; or R 7 groups may bond each other to form a ring, which comprises reacting: a halogenated titanium complex represented by the general formula (II) wherein, Cp, A, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are the same as defined above,and X 1 and X 2 each independently represent a halogen atom; with an alkali metal alkoxide of the formula ( III ) ; R 7 OM wherein R 7 is the same as defined above and M represents an alkali metal. 2. The method according to Item 1, which comprises: reacting a halogenated titanium complex of the formula ( II ) with an alcohol of the formula ( III' ): R 7 OH wherein R 7 is the same as defined above. 3. The method according to Item 2, wherein the reaction is conducted in the co-existence of an amine, 4. A method for producing an aryloxytitanium complex represented by the general formula (IV): wherein Cp, A, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 have respectively the same meanings as defined above; and Ar is the same or different and each represents an aryl group having 6 to 20 carbon atoms which may be substituted, or Ars may bond mutually to form a ring, which comprises reacting a halogenated titanium complex represented by the general formula ( II ) as defined in item 1 above with an alkali metal aryloxide represented by the general formula ( V ) : ArOM wherein M represents an alkali metal atom, and Ar is the same as defined above. 5. A method for producing an aminotitanium complex represented by the general formula (VI): wherein Cp, A, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 have respectively the same meanings as defined above, and R 9 and R 10 each independently represent an alkyl group having 1 to 10 carbon atoms which may be substituted, an aralkyl group having 7 to 20 carbon atoms which may be substituted or a silyl group having 1 to 20 carbon atoms which may be substituted, or R 9 and R 10 may bond each other to form a ring, which comprises reacting a halogenated titanium complex represented by the general formula ( II ) as define above with an alkali metal amide represented by the general formula ( VII ): R 9 R 10 NM wherein M represents an alkali metal atom, and R 9 and R 10 are the same as defined above. The present invention will be described in detail below. Examples of the group having cyclopentadiene-type anion skeleton represented as a substituent Cp in the alkoxytitanium complex ( I ), the aryloxytitanium complex ( IV ) and the aminotitanium complex ( VI ) include: an optionally substituted cyclopentadienyl group, an optionally substituted indenyl group and an optionally substituted fluorenyl group. The optionally substituted cyclopentadienyl group may be substituted with at least one group selected from: a C1-C10 alkyl group, a phenyl group, a naphthyl group, a silyl group substituted with three groups selected from C1-C4 alkyl group and a phenyl group, and two adjacent C1-C10 alkyl groups may bond together at their terminals to form a tetramethylene group. The optionally substituted indenyl group may be substituted with at lest one group selected from: a C1-C10 alkyl group, a phenyl group and a naphthyl group. The optionally substituted fluorenyl group may be substituted with at lest one group group selected from: a C1-C12 alkyl group, a phenyl group and a naphthyl group. Examples of the optionally substituted cyclopentadienyl groups include: a η5-cyclopentadienyl group, η5-methylcyclopentadienyl group, η5-dimethylcyclopentadienyl group, η5-trimethylcyclopentadienyl group, η5-tetramethylcyclopentadienyl group, η5-ethylcyclopentadienyl group, η5-n-propylcyclopentadienyl group, η5-isopropylcyclopentadienyl group, η5-n-butylcyclopentadienyl group, η5-sec-butylcyclopentadienyl group, η5-tert-butylcyclopentadienyl group, η5-n-pentylcyclopentadienyl group, η5-neopentylcyclopentadienyl group, η5-n-hexylcyclopentadienyl group, η5-n-octylcyclopentadienyl group, η5-tetrahydroindenyl group, η5-octahydrofluorenyl group, η5-phenylcyclopentadienyl group, η5-naphthylcyclopentadienyl group, η5-trimethylsilylcyclopentadienyl group, η5-triethylsilylcyclopentadienyl group, η5-triphenylsilylcyclopentadienyl group and η5-tert-butyldimethylsilylcyclopentadienyl group. Examples of the optionally substituted indenyl groups include: a η5-indenyl group, η5-methylindenyl group, η 5-dimethylindenyl group, η5-ethylindenyl group, η5-n-propylindenyl group, η5-isopropylindenyl group, η5-n-butylindenyl group, η5-sec-butylindenyl group, η5-tert-butylindenyl group, η5-n-pentylindenyl group, η5-neopentylindenyl group, η5-n-hexylindenyl group, η5-n-octylindenyl group, η5-n-decylindenyl group, η5-phenylindenyl group, η5-methylphenylindenyl group and η5-naphthylindenyl group. Examples of the optionally substituted fluorenyl group include: a η5-fluorenyl group, η5-methylfluorenyl group, η5-dimethylfluorenyl group, η5-ethylfluorenyl group, η 5-diethylfluorenyl group, η5-n-propylfluorenyl group, η 5-di-n-propylfluorenyl group, η5-isopropylfluorenyl group, η5-diisopropylfluorenyl group, η5-n-butylfluorenyl group, η5-sec-butylfluorenyl group, η5-tert-butylfluorenyl group, η5-di-n-butylfluorenyl group, η5-di-sec-butylfluorenyl group, η5-di-tert-butylfluorenyl group, η 5-n-pentylfluorenyl group, η5-neopentylfluorenyl group, η 5-n-hexylfluorenyl group, η5-n-octylfluorenyl group, η 5-n-decylfluorenyl group, η5-n-dodecylfluorenyl group, η 5-phenylfluorenyl group, η5-di-phenylfluorenyl group, η 5-methylphenylfluorenyl group, η5-naphthylfluorenyl group and the like, and preferably examples thereof include a η 5-cyclopentadienyl group, η5-methylcyclopentadienyl group, η5-tert-butylcyclopentadienyl group, η5-tetramethylcyclopentadienyl group, η5-indenyl group and η 5-fluorenyl group. Examples of the halogen in the substituents R 1 , R 2 , R 3 and R 4 include fluorine, chlorine, bromine and iodine atoms. Examples of the alkyl group having 1 to 10 carbon atoms which may be substituted by fluorine in the substituents R 1 , R 2 , R 3 , R 4 , R 5 and R 6 include a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, n-pentyl group, neopentyl group, amyl group, n-hexyl group, n-octyl group, n-decyl group, fluoromethyl group, difluoromethyl group, trifluoromethyl group, fluoroethyl group, difluoroethyl group, trifluoroethyl group, tetrafluoroethyl group, pentafluoroethyl group, perfluoropropyl group, perfluorobutyl group, perfluoropentyl group, perfluorohexyl group, perfluorooctyl group and perfluorodecyl group and preferred examples thereof include a methyl group, ethyl group, isopropyl group, tert-butyl group and amyl group. Examples of the alkoxy group having 1 to 10 carbon atoms which may be substituted by fluorine in the substituents R 1 , R 2 , R 3 , R 4 , R 5 and R 6 include a methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, sec-butoxy group, tert-butoxy group, n-pentoxy group, neopentoxy group, n-hexoxy group, n-octoxy group, n-dexoxy group, and fluorine atom-substituted alkoxy groups thereof, and preferable examples thereof include a methoxy group, ethoxy group and tert-butoxy group. Examples of the aryl group having 6 to 20 carbon atoms which may be substituted by fluorine in the substituents R 1 , R 2 , R 3 , R 4 , R 5 and R 6 include a phenyl group, 2-tolyl group, 3-tolyl group, 4-tolyl group, 2,3-xylyl group, 2,4-xylyl group, 2,5-xylyl group, 2,6-xylyl group, 3,4-xylyl group, 3,5-xylyl group, 2,3,4-trimethylphenyl group, 2,3,5-trimethylphenyl group, 2, 3, 6-trimethylphenyl group, 2,4,6-trimethylphenyl group, 3,4,5-trimethylphenyl group, 2,3,4,5-tetramethylphenyl group, 2,3,4,6-tetramethylphenyl group, 2,3,5,6-tetramethylphenyl group, pentamethylphenyl group, ethylphenyl group, n-propylphenyl group, isopropylphenyl group, n-butylphenyl group, sec-butylphenyl group, tert-butylphenyl group, n-pentylphenyl group, neopentylphenyl group, n-hexylphenyl group, n-octylphenyl group, n-decylphenyl group, n-dodecylphenyl group, n-tetradecylphenyl group, naphthyl group, anthracenyl group and fluorine atom-substituted aryl groups thereof. Among them, a phenyl group is preferred. Examples of the aryloxy group having 6 to 20 carbon atoms which may be substituted by fluorine in the substituents R 1 , R 2 , R 3 , R 4 , R 5 and R 6 include a phenoxy group, 2-methylphenoxy group, 3-methylphenoxy group, 4-methylphenoxy group, 2,3-dimethylphenoxy group, 2,4-dimethylphenoxy group, 2,5-dimethylphenoxy group, 2,6-dimethylphenoxy group, 3,4-dimethylphenoxy group, 3,5-dimethylphenoxy group, 2,3,4-trimethylphenoxy group, 2,3,5-trimethylphenoxy group, 2,3,6-trimethylphenoxy group, 2,4,5-trimethylphenoxy group, 2,4,6-trimethylphenoxy group, 3,4,5-trimethylphenoxy group, 2,3,4,5-tetramethylphenoxy group, 2,3,4,6-tetramethylphenoxy group, 2,3,5,6-tetramethylphenoxy group, pentamethylphenoxy group, ethylphenoxy group, n-propylphenoxy group, isopropylphenoxy group, n-butylphenoxy group, sec-butylphenoxy group, tert-butylphenoxy group, n-hexylphenoxy group, n-octylphenoxy group, n-decylphenoxy group, n-tetradecylphenoxy group, naphtoxy group, anthracenoxy group and fluorine-substituted aryloxy groups thereof. Examples of the aralkyl group having 7 to 20 carbon atoms which may be substituted by fluorine in the substituents R 1 , R 2 , R 3 , R 4 , R 5 and R 6 include a benzyl group, (2-methylphenyl)methyl group, (3-methylphenyl)methyl group, (4-methylphenyl)methyl group, (2,3-dimethylphenyl)methyl group, (2,4-dimethylphenyl)methyl group, (2,5-dimethylphenyl)methyl group, (2,6-dimethylphenyl)methyl group, (3,4-dimethylphenyl)methyl group, (2,3,4-trimethylphenyl)methyl group, (2,3,5-trimethylphenyl)methyl group, (2,3,6-trimethylphenyl)methyl group, (3,4,5-trimethylphenyl)methyl group, (2,4,6-trimethylphenyl)methyl group, (2,3,4,5-tetramethylphenyl)methyl group, (2,3,4,6-tetramethylphenyl)methyl group, (2,3,5,6-tetramethylphenyl)methyl group, (pentamethylphenyl)methyl group, (ethylphenyl)methyl group, (n-propylphenyl)methyl group, (isopropylphenyl)methyl group, (n-butylphenyl)methyl group, (sec-butylphenyl)methyl group, (tert-butylphenyl)methyl group, (n-pentylphenyl)methyl group, (neopentylphenyl)methyl group, (n-hexylphenyl)methyl group, (n-octylphenyl)methyl group, (n-decylphenyl)methyl group, (n-dodecylphenyl)methyl group, (n-tetradecylphenyl)methyl group, naphthylmethyl group, anthracenylmethyl group and fluorine atom-substituted aralkyl groups thereof, and a benzyl group is preferable. Examples of the aralkyloxy group having 7 to 20 carbon atoms which may be substituted by fluorine in the substituents R 1 , R 2 , R 3 , R 4 , R 5 and R 6 include a benzyloxy group, (2-methylphenyl)methoxy group, (3-methylphenyl)methoxy group, (4-methylphenyl)methoxy group, (2,3-dimethylphenyl)methoxy group, (2,4-dimethylphenyl)methoxy group, (2,5-dimethylphenyl)methoxy group, (2,6-dimethylphenyl)methoxy group, (3,4-dimethylphenyl)methoxy group, (2,3,4-trimethylphenyl)methoxy group, (2,3,5-trimethylphenyl)methoxy group, (2,3,6-trimethylphenyl)methoxy group, (3,4,5-trimethylphenyl)methoxy group, (2,4,6-trimethylphenyl)methoxy group, (2,3,4,5-tetramethylphenyl)methoxy group, (2,3,4,6-tetramethylphenyl)methoxy group, (2,3,5,6-tetramethylphenyl)methoxy group, (pentamethylphenyl)methoxy group, (ethylphenyl)methoxy group, (n-propylphenyl)methoxy group, (isopropylphenyl)methoxy group, (n-butylphenyl)methoxy group, (sec-butylphenyl)methoxy group, (tert-butylphenyl)methoxy group, (n-pentylphenyl)methoxy group, (neopentylphenyl)methoxy group, (n-hexylphenyl)methoxy group, (n-octylphenyl)methoxy group, (n-decylphenyl)methoxy group, (n-dodecylphenyl)methoxy group, (n-tetradecylphenyl)methoxy group, naphthylmethoxy group, anthracenylmethoxy group and fluorine atom-substituted aralkyloxy groups thereof, and a benzyloxy group is preferable. The hydrocarbon-substituted silyl group having 1 to 20 carbon atoms in the substituents R 1 , R 2 , R 3 , R 4 , R 5 and R 6 is a silyl group substituted by a hydrocarbon having 1 to 20 carbon atoms, and examples of the hydrocarbon group include alkyl groups having 1 to 10 carbon atoms such as a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, n-pentyl group, neopentyl group, amyl group, n-hexyl group, cyclohexyl group, n-octyl group and n-decyl group, and aryl groups having 1 to 20 carbon atoms such as a phenyl group, tolyl group, xylyl group, naphthyl group and anthracenyl group. Examples of such a hydrocarbon-substituted silyl group having 1 to 20 carbon atoms include mono-substituted silyl groups such as a methylsilyl group, ethylsilyl group and phenylsilyl group, di-substituted silyl groups such as a dimethylsilyl group, diethylsilyl group and diphenylsilyl group, tri-substituted silyl groups such as a trimethylsilyl group, triethylsilyl group, tri-n-propylsilyl group, tri-isopropylsilyl group, tri-n-butylsilyl group, tri-sec-butylsilyl group, tri-tert-butylsilyl group, tri-isobutylsilyl group, tert-butyldimethylsilyl group, tri-n-pentylsilyl group, tri-n-hexylsilyl group, tricyclohexylsilyl group and triphenylsilyl group, and preferred examples thereof include a trimethylsilyl group, tert-butyldimethylsilyl group, and triphenylsilyl group. Any of these substituted silyl groups may have substitution by a fluorine atom on a hydrocarbon group thereof. The hydrocarbon-substituted amino group having 1 to 20 carbon atoms in the substituents R 1 , R 2 , R 3 , R 4 , R 5 and R 6 is an amino group substituted by two hydrocarbon groups, and examples of the hydrocarbon group include alkyl groups having 1 to 10 carbon atoms such as a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, n-pentyl group, neopentyl group, amyl group, n-hexyl group, cyclohexyl group, n-octyl group and n-decyl group, and aryl groups having 1 to 20 carbon atoms such as a phenyl group, tolyl group, xylyl group, naphthyl group and anthracenyl group. Examples of such a hydrocarbon-substituted amino group having 1 to 20 carbon atoms include a dimethylamino group, diethylamino group, di-n-propylamino group, diisopropylamino group, di-n-butyl amino group, di-sec-butylamino group, di-tert-butylamino group, di-isobutylamino group, tert-butylisopropylamino group, di-n-hexylamino group, di-n-octylamino group, di-n-decylamino group and diphenylamino group and a dimethylamino group and a diethylamino group are preferably listed. Examples of the alkyl group having 1 to 10 carbon atoms which may be substituted in the substituents R 7 include alkyl groups such as a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, n-pentyl group, neopentyl group, amyl group, n-hexyl group, n-octyl group and n-decyl group, halogenated alkyl groups such as a chloromethyl group, dichloromethyl group, trichloromethyl group, bromomethyl group, dibromomethyl group, tribromomethyl group, fluoromethyl group, difluoromethyl group, trifluoromethyl group, fluoroethyl group, difluoroethyl group, trifluoroethyl group, tetrafluoroethyl group, pentafluoroethyl group, perfluoropropyl group, hexafluoroisopropyl group, perfluorobutyl group, perf luoropentyl group, perfluorohexyl group, perfluorooctyl group and perfluorodecyl group and alkoxyalkyl groups such as a methoxymethyl group, ethoxymethyl group, n-propoxymethyl group, isopropoxymethyl group, phenoxymethyl group, methoxyethyl group, ethoxyethyl group, n-propoxyethyl group, isopropoxyethyl group and phenoxyethyl group and preferred examples thereof include a methyl group, ethyl group, isopropyl group, hexafluoroisopropyl group and methoxyethyl group. Examples of the aralkyl group having 7 to 20 carbon atoms which may be substituted in the substituent R 7 include a benzyl group, (2-methylphenyl)methyl group, (3-methylphenyl)methyl group, (4-methylphenyl)methyl group, (2,3-dimethylphenyl)methyl group, (2,4-dimethylphenyl)methyl group, (2,5-dimethylphenyl)methyl group, (2,6-dimethylphenyl)methyl group, (3,4-dimethylphenyl) methyl group, (2,3,4-trimethylphenyl)methyl group, (2,3,5-trimethylphenyl)methyl group, (2,3,6-trimethylphenyl)methyl group, (3,4,5-trimethylphenyl)methyl group, (2,4,6-trimethylphenyl)methyl group, (2,3,4,5-tetramethylphenyl)methyl group, (2,3,4,6-tetramethylphenyl)methyl group, (2,3,5,6-tetramethylphenyl)methyl group, (pentamethylphenyl)methyl group, (ethylphenyl)methyl group, (n-propylphenyl)methyl group, (isopropylphenyl)methyl group, (n-butylphenyl)methyl group, (sec-butylphenyl)methyl group, (tert-butylphenyl)methyl group, (n-pentylphenyl)methyl group, (neopentylphenyl)methyl group, (n-hexylphenyl)methyl group, (n-octylphenyl)methyl group, (n-decylphenyl)methyl group, (n-dodecylphenyl)methyl group, (n-tetradecylphenyl)methyl group, naphthylmethyl group, anthracenylmethyl group, 1-phenylethyl group, 1-(1-naphthyl)ethyl group and 1-(2-naphthyl)ethyl group; haloaralkyl groups obtained by substitution by halogen such. as a fluorine atom, chlorine atom or iodine atom on the above-described groups; alkoxyaralkyl groups obtained by optional substitution by a methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, sec-butoxy group and tert-butoxy group of a halogen atom on the above-described haloaralkyl groups; and a cyanoaralkyl group and nitroaralkyl group. Among them, a benzyl group is preferred. Two R 7 groups may bond mutually to form a ring, and examples thereof include 1,2-dioxy groups such as an ethylenedioxy group, methylethylenedioxy group, 1,1-dimethylethylenedioxy group, 1,2-dimethylethylenedioxy group, 1,1,2-trimethylethylenedioxy group, tetramethylethylenedioxy group, phenylethylenedioxy group, 1,1-diphenylethylenedioxy group, 1,2-diphenylethylenedioxy group, 1,1,2-triphenylethylenedioxy group, tetraphenylethylenedioxy group, cyclobutane-1,2-dioxy group, cyclopentane-1,2-dioxy group, cyclohexane-1,2-dioxy group, cycloheptane-1,2-dioxy group and cyclooctane-1,2-dioxy group; 1,3-dioxy groups such as a propylene-1,3-dioxy group, 1-methylpropylene-1,3-dioxy group, 2-methylpropylene-1,3-dioxy group, 1,1-dimethylpropylene-1,3-dioxy group, 1,2-dimethylpropylene-1,3-dioxy group, 1,3-dimethylpropylene-1,3-dioxy group, 2,2-dimethylpropylene-1,3-dioxy group, 1,1,2-trimethylpropylenedioxy group, 1,1,3-trimethylpropylenedioxy group, 1,2,2-trimethylpropylenedioxy group, 1,2,3-trimethylpropylenedioxy group, 1,1,2,2-tetramethylpropylenedioxy group, 1,1,2,3-tetramethylpropylenedioxy group, 1,1,3,3-tetramethylpropylenedioxy group, 1,2,2,3-tetramethylpropylenedioxy group, 1,1,2,2,3-pentamethylpropylenedioxy group, 1,1,2,3,3-pentamethylpropylenedioxy group, 1,1,2,2,3,3-hexamethylpropylenedioxy group, 2-phenylpropylene-1,3-dioxy group, 2-phenylpropylene-1,3-dioxy group, 1,1-2-phenylpropylene-1,3-dioxy group, 1,2-diphenylpropylene-1,3-dioxy group, 1,3-diphenylpropylene-1,3-dioxy group, 2,2-diphenylpropylene-1,3-dioxy group, 1,1,2-triphenylpropylenedioxy group, 1,1,3-triphenylpropylenedioxy group, 1,2,2-triphenylpropylenedioxy group, 1,2,3-triphenylpropylenedioxy group, 1,1,2,2-tetraphenylpropylenedioxy group, 1,1,2,3-tetraphenylpropylenedioxy group, 1,1,3,3-tetraphenylpropylenedioxy group, 1,2,2,3-tetraphenylpropylenedioxy group, 1,1,2,2,3-pentaphenylpropylenedioxy group, 1,1,2,3,3-pentaphenylpropylenedioxy group, and 1,1,2,2,3,3-hexaphenylpropylenedioxy group and also stereo and optical isomers thereof. Examples of the aryl group having 6 to 20 carbon atoms which may be substituted, represented by Ar, in the alkali metal aryloxides ( V ) and the aryloxytitanium complex ( IV ) include a phenyl group, 2-methylphenyl group, 3-methylphenyl group, 4-methylphenyl group, 2,3-dimethylphenyl group, 2,4-dimethylphenyl group, 2,5-dimethylphenyl group, 2,6-dimethylphenyl group, 3,4-dimethylphenyl group, 2,3,4-trimethylphenyl group, 2,3,5-trimethylphenyl group, 2,3,6-trimethylphenyl group, 3,4,5-trimethylphenyl group, 2,4,6-trimethylphenyl group, 2,3,4,5-tetramethylphenyl group, 2,3,4,6-tetramethylphenyl group, 2,3,5,6-tetramethylphenyl group, pentamethylphenyl group, ethylphenyl group, n-propylphenyl group, isopropylphenyl group, n-butylphenyl group, sec-butylphenyl group, tert-butylphenyl group, n-pentylphenyl group, neopentylphenyl group, n-hexylphenyl group, n-octylphenyl group, n-decylphenyl group, n-dodecylphenyl group, n-tetradecylphenyl group, naphthyl group, anthracenyl group; haloaryl groups obtained by substitution by halogen such as a fluorine atom, chlorine atom or iodine atom on the above-described groups; alkoxyaryl groups obtained by optional substitution by a methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, sec-butoxy group and tert-butoxy group of a halogen atom on the above-described haloaralkyl groups; and a cyanoaryl group and nitroaryl group and preferred examples thereof include a phenyl group, 4-methylphenyl group and 2,4,6-trimethylphenyl group. The substituents Ars may bond to each other to form a ring, and examples thereof include biaryl groups and cross-linked biaryl groups such as a 1,1'-biphenyl-2,2'-diyl group, 1,1'-biphenyl-4,4'-dimethyl-2,2'-diyl group, 1,1'-biphenyl-6,6'-dimethyl-2,2'-diyl group, 1,1'-biphenyl-3,3'-di-tert-butyl-2,2'-diyl group, 1,1'-binaphthyl-2,2'-diyl group, 1,1'-binaphthyl-3,3'-bis(trimethylsilyl)-2,2'-diyl group, 1,1'-thiobiphenyl-2,2'-diyl group, 1,1'-thiobiphenyl-5,5'-dimethyl-2,2'-diyl group, 1,1'-thiobiphenyl-3,3'-di-tert-butyl-5,5'-dimethyl-2,2'-diyl group, 1,1'-methylenebiphenyl-2,2'-diyl group, 1,1'-methylenebiphenyl-5,5'-dimethyl-2,2'-diyl group, 1,1'-methylenebiphenyl-3,3'-di-tert-butyl-5,5'-dimethyl-2,2'-diyl group, 1,1'-phenylphosphinobiphenyl-2,2'-diyl group, 1,1'-phenylphosphinobiphenyl-5,5'-dimethyl-2,2'-diyl oup and 1,1'-phenylphosphinobiphenyl-3,3'-di-tert-butyl-5,5'-dimethyl-2,2'-diyl group and preferred are the 1,1'-biphenyl-2,2'-diyl group and 1,1'-binaphthyl-2,2'-diyl group. Examples of the alkyl group having 1 to 10 carbon atoms which may be substituted in the substituents R 9 and R 10 in the alkali metal amides ( VII ) and the aminotitanium complex ( VI ) include alkyl groups such as a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, n-pentyl group, neopentyl group, amyl group, n-hexyl group, n-octyl group and n-decyl group, halogenated alkyl groups such as a chloromethyl group, dichloromethyl group, trichloromethyl group, bromomethyl group, dibromomethyl group, tribromomethyl group, fluoromethyl group, difluoromethyl group, trifluoromethyl group, fluoroethyl group, difluoroethyl group, trifluoroethyl group, tetrafluoroethyl group, pentafluoroethyl group, perfluoropropyl group, hexafluoroisopropyl group, perfluorobutyl group, perfluoropentyl group, perfluorohexyl group, perfluorooctyl group and perfluorodecyl group and alkoxyalkyl groups such as a methoxymethyl group, ethoxymethyl group, n-propoxymethyl group, isopropoxymethyl group, phenoxymethyl group, methoxyethyl group, ethoxyethyl group, n-propoxyethyl group, isopropoxyethyl group and phenoxyethyl group and preferred examples thereof include a methyl group, ethyl group, isopropyl group, and methoxyethyl group. Examples of the aralkyl group having 7 to 20 carbon atoms which may be substituted in the substituents R 7 include a benzyl group, (2-methylphenyl)methyl group, (3-methylphenyl)methyl group, (4-methylphenyl)methyl group, (2,3-dimethylphenyl)methyl group, (2,4-dimethylphenyl)methyl group, (2,5-dimethylphenyl)methyl group, (2,6-dimethylphenyl)methyl group, (3,4-dimethylphenyl) methyl group, (2,3,4-trimethylphenyl)methyl group, (2,3,5-trimethylphenyl)methyl group, (2,3,6-trimethylphenyl)methyl group, (3,4,5-trimethylphenyl)methyl group, (2,4,6-trimethylphenyl)methyl group, (2,3,4,5-tetramethylphenyl)methyl group, (2,3,4,6-tetramethylphenyl)methyl group, (2,3,5,6-tetramethylphenyl)methyl group, (pentamethylphenyl)methyl group, (ethylphenyl)methyl group, (n-propylphenyl)methyl group, (isopropylphenyl)methyl group, (n-butylphenyl)methyl group, (sec-butylphenyl)methyl group, (tert-butylphenyl)methyl group, (n-pentylphenyl)methyl group, (neopentylphenyl)methyl group, (n-hexylphenyl)methyl group, (n-octylphenyl)methyl group, (n-decylphenyl)methyl group, (n-dodecylphenyl)methyl group, (n-tetradecylphenyl)methyl group, naphthylmethyl group, anthracenylmethyl group, 1-phenylethyl group, 1-(1-naphthyl)ethyl group, 1-(2-naphthyl)ethyl group; haloaralkyl groups obtained by substitution by halogen such as a fluorine atom, chlorine atom or iodine atom on the above-described groups; alkoxyaralkyl groups obtained by optional substitution by a methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, sec-butoxy group, tert-butoxy group and the like of a halogen atom on the above-described haloaralkyl groups; and a cyanoaralkyl group and nitroaralkyl group. Among them, a benzyl group is preferred. The hydrocarbon-substituted silyl group having 1 to 20 carbon atoms which may be substituted in the substituents R 9 and R 10 is a silyl group substituted by a hydrocarbon group having 1 to 20 carbon atoms, and examples of the hydrocarbon group include alkyl groups having 1 to 10 carbon atoms such as a methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group, n-pentyl group, neopentyl group, amyl group, n-hexyl group, cyclohexyl group, n-octyl group and n-decyl group, and aryl groups having 1 to 20 carbon atoms such as a phenyl group, tolyl group, xylyl group, naphthyl group and anthracenyl group. Examples of such a hydrocarbon-substituted silyl group having 1 to 20 carbon atoms include mono-substituted silyl groups such as a methylsilyl group, ethylsilyl group and phenylsilyl group, di-substituted silyl groups such as a dimethylsilyl group, diethylsilyl group and diphenylsilyl group, tri-substituted silyl groups such as a trimethylsilyl group, triethylsilyl group, tri-n-propylsilyl group, tri-isopropylsilyl group, tri-n-butylsilyl group, tri-sec-butylsilyl group, tri-tert-butylsilyl group, tri-isobutylsilyl group, tert-butyldimethylsilyl group, tri-n-pentylsilyl group, tri-n-hexylsilyl group, tricyclohexylsilyl group and triphenylsilyl group, and preferable examples thereof include a trimethylsilyl group, tert-butyldimethylsilyl group, and triphenylsilyl group. Examples of the alkoxytitanium complex ( I ) in which A represents a carbon atom obtained according to the present invention include (η5-cyclopentadienyl)(2-phenoxy)methanetitanium dimethoxide, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium dimethoxide, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-cyclopentadienyl)(2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3,9-dimethyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)methanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-3-methyllcyclopentadienyl)(2-phenoxy)methanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η 5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(2-phenoxy)diphenylmathanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmathanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmathanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmathanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmathanetitanium dimethoxide, (η 5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmathanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmathanetitanium dimethoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmathanetitanium dimethoxide, (η 5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmathanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)methanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl) (3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dimethoxide, (η5-cyclopentadienyl)(2-phenoxy)methanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)methanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl) (3-tert-butyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium (ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η 5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-cyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl) (3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylinethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl) (3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-text-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(hexafluoro isopropoxide), and compounds obtained by substituting η5-2-methylcyclopentadienyl, η5-2-tert-butylcyclopentadienyl, η5-2-n-butylcyclopentadienyl, η5-3-n-butylcyclopentadienyl, η5-indenyl, η5-fluorenyl for η 5-cyclopentadienyl on the above-described compounds, further, compounds obtained by substituting diethoxide, dipropoxide, diisopropoxide, dibutoxide, 1,2-diphenylethylene dioxide, cyclohexane-1,2-dioxide or dibenzyl oxide for dimethoxide on the above-described compounds. Examples of the alkoxytitanium complex ( I ) in which A represents a silicon atom obtained according to the present invention include (η5-cyclopentadienyl)(2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium dimethoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-indenyl)(2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-indenyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-indenyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-indenyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η 5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-indenyl)(2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-indenyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-indenyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-indenyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-indenyl) (3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η 5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dimethoxide, (η5-cyclopentadienyl)(2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-indenyl)(2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-indenyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-indenyl)(2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-indenyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(ethylene dioxide), (η5-cyclopentadienyl)(2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy) dimethylsilanetitaniumbis (hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl) (3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl) (3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2, 3, 4, 5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl) (3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl) (3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-text-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(hexafluoro isopropoxide), and compounds obtained by substituting η5-2-methylcyclopentadienyl, η5-3-methylcyclopentadienyl, η5-2-tert-butylcyclopentadienyl, η5-2-n-butylcyclopentadienyl, η5-3-n-butylcyclopentadienyl, η 5-fluorenyl for η5-cyclopentadienyl on the above-described compounds, further, compounds obtained by substituting diethoxide, dipropoxide, diisopropoxide, dibutoxide, 1,2-diphenylethylene dioxide, cyclohexane-1,2-dioxide or dibenzyl oxide for dimethoxide on the above-described compounds. The alkoxytitanium complex ( I ) can be produced by a method in which the alkali metal alkoxides ( III ) are reacted with the halogenated titanium complex ( II ) (hereinafter, referred to as Method A). The alkoxytitanium complex ( I ) can be produced also by a method in which the alcohols ( III' ) are reacted with the halogenated titanium complex ( II ) (hereinafter, referred to as Method B), and this production is preferably conducted in the presence of an amine compound. Examples of the aryloxytitanium complex ( IV ) in which A represents a carbon atom obtained according to the present invention include (η5-cyclopentadienyl)(2-phenoxy)methanetitanium diphenoxide, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium diphenoxide, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-cyclopentadienyl)(2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)methanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-3-methyllcyclopentadienyl)(2-phenoxy)methanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η 5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(2-phenoxy)diphenylmathanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmathanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmathanetitanium diphenoxide, (η5-3-methylcyclopentadienyl) (3-tert-butyl-5-methoxy-2-phenoxy)diphenylmathanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmathanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmathanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmathanetitanium diphenoxide, (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmathanetitanium diphenoxide, (η 5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmathanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)methanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium diphenoxide, (η5-3-tertbutylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium diphenoxide, (η5-cyclopentadienyl)(2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium(1,1'-binaphthyl-2,2'-dioxide), and compounds obtained by substituting η5-2-methylcyclopentadienyl, η5-2-tert-butylcyclopentadienyl, η5-2-n-butylcyclopentadienyl, η5-3-n-butylcyclopentadienyl, η5-indenyl, η5-fluorenyl for η 5-cyclopentadienyl on the above-described compounds, further, compounds obtained by substituting di-4-methylphenoxide, bis(2,4,6-trimethylphenoxide)orbis(pentafluorophenoxide) for diphenoxide on the above-described compounds. Examples of the aryloxytitanium complex ( IV ) in which A represents a silicon atom obtained according to the present invention include (η5-cyclopentadienyl)(2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-cyclopentadienyl) (2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium diphenoxide, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-indenyl)(2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-indenyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-indenyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-indenyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η 5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-indenyl)(2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-indenyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-indenyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-indenyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η 5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium diphenoxide, (η5-cyclopentadienyl)(2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-ghenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium(1,1'-binaphthyl-2,2'-dioxide), and compounds obtained by substituting η5-2-methylcyclopentadienyl, η5-3-methylcyclopentadienyl, η 5-2-tert-butylcyclopentadienyl, η5-2-n-butylcyclopentadienyl, η5-3-n-butylcyclopentadienyl, η 5-fluorenyl for η5-cyclopentadienyl on the above-described compounds, further, compounds obtained by substituting di-4-methylphenoxide, bis(2,4,6-trimethylphenoxide) or bis(pentafluorophenoxide) for diphenoxide on the above-described compounds. The aryloxytitanium complex ( IV ) can be produced also by a method in which the alkali metal aryloxides ( V ) are reacted with the halogenated titanium complex ( II ). Examples of the aminotitanium complex ( VI ) in which A represents a carbon atom obtained according to the present invention include (η5-cyclopentadienyl)(2-phenoxy)methanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)methanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl) (3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(2-phenoxy)diphenylmathanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmathanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmathanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmathanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmathanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmathanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmathanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmathanetitaniumbis(diethylamide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmathanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl) (3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(2-phenoxy)methanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-cyclopentadienyl) (2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)methanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η 5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl) (3,4-dimethyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy) diphenylmethanetitaniumbis (diphenylamide) , (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitaniumbis(diphenylamide), and compounds obtained by substituting η 5-2-methylcyclopentadienyl, η5-2-tert-butylcyclopentadienyl, η5-2-n-butylcyclopentadienyl, η5-3-n-butylcyclopentadienyl, η5-indenyl, η5-fluorenyl for η 5-cyclopentadienyl on the above-described compounds, further, compounds obtained by substituting dimethylamide, dipropylamide, diisopropylamide, dibutylamide, bis(trimethylsilylamide), piperidide, dicyclohexylamide or dibenzylamide for diethylamide. Examples of the aminotitanium complex ( VI ) in which A represents a silicon atom obtained according to the present invention include (η5-cyclopentadienyl)(2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl) (3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-indenyl)(2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-indenyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(diethylamide). (η5-indenyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-indenyl)(2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-indenyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diethylamide), (η5-cyclopentadienyl) (2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-indenyl)(2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-indenyl)(2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl) (3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitaniumbis(diphenylamide), and compounds obtained by substituting η5-2-methylcyclopentadienyl, η5-3-methylcyclopentadienyl, η5-2-tert-butylcyclopentadienyl, η5-2-n-butylcyclopentadienyl, η5-3-n-butylcyclopentadienyl, η 5-fluorenyl for η5-cyclopentadienyl on the above-described compounds, compounds obtained by optional substitution by dimethoxysilane or diethoxysilane for dimethylsilane on the above-described compounds, and further, compounds obtained by substituting dimethylamide, dipropylamide, diisopropylamide, dibutylamide, bis(trimethylsilylamide), piperidide, dicyclohexylamide or dibenzylamide for diethylamide on the above-described compounds. The aminotitanium complex ( VI ) can be produced by a method in which the alkali metal amides ( VII ) are reacted with the halogenated titanium complex ( II ). Examples of halogen in the substituents X 1 and X 2 in the halogenated titanium complex ( II ) include fluorine, chlorine, bromine and iodine. Examples of the halogenated titanium complex ( II ) in which A represents a carbon atom include (η5-cyclopentadienyl)(2-phenoxy)methanetitanium dichloride, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium dichloride, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-cyclopentadienyl) (2-phenoxy)dimethylmethanetitanium dichloride, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-cyclopentadienyl) (2-phenoxy)diphenylmethanetitanium dichloride, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)methanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium dichloride, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium dichloride, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium dichloride, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium dichloride, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium dichloride, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-3-methylcyclopentadienyl)(2-phenoxy)methanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-3-methylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η 5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-methylcyclopentadienyl)(2-phenoxy)diphenylmathanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmathanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmathanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmathanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmathanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyl-5-chlaro-2-phenoxy)diphenylmathanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmathanetitanium dichloride, (η5-3-methylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmathanetitanium dichloride, (η 5-3-methylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmathanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)methanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)methanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)methanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)methanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)methanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)methanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)methanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylmethanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dichloride, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylmethanetitanium dichloride, and compounds obtained by substituting η5-2-methylcyclopentadienyl, η5-2-tert-butylcyclopentadienyl, η5-2-n-butylcyclopentadienyl, η5-3-n-butylcyclopentadienyl, η5-indenyl, η 5-fluorenyl for η 5-cyclopentadienyl, and substituting dibromide, diiodide for dichloride on the above-described compounds. Examples of the halogenated titanium complex ( II ) in which A represents a silicon atom include (η5-cyclopentadienyl)(2-phenoxy)dimethylsilanetitanium dichloride, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-cyclopentadienyl)(2-phenoxy)diphenylsilanetitanium dichloride, (η5-cyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-cyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)dimethylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(2-phenoxy)diphenylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-2,3,4,5-tetramethylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η 5-2,3,4,5-tetramethylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-indenyl)(2-phenoxy)dimethylsilanetitaniumdichloride, (η5-indenyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium dichloride, (η5-indenyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium dichloride, (η5-indenyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η 5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-indenyl)(2-phenoxy)diphenylsilanetitanium dichloride, (η5-indenyl) (3,4-dimethyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-indenyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-indenyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium dichloride, (η5-indenyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-indenyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium dichloride, (η5-indenyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-indenyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η 5-indenyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)dimethylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)dimethylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)dimethylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(2-phenoxy)diphenylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3,4-dimethyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-methoxy-2-phenoxy)diphenylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyl-5-chloro-2-phenoxy)diphenylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-phenyl-2-phenoxy)diphenylsilanetitanium dichloride, (η5-3-tert-butylcyclopentadienyl)(3-tert-butyldimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, (η 5-3-tert-butylcyclopentadienyl)(3-trimethylsilyl-5-methyl-2-phenoxy)diphenylsilanetitanium dichloride, and compounds obtained by substituting η5-2-methylcyclopentadienyl, η5-3-methylcyclopentadienyl, η5-2-tert-butylcyclopentadienyl, η5-2-n-butylcyclopentadienyl, η5-3-n-butylcyclopentadienyl, η 5-fluorenyl for η5-cyclopentadienyl, and substituting bromide, iodide for chloride on the above-described compounds. Examples of the alkali metal alkoxides of the formula ( III ) include sodium methoxide, sodium ethoxide, sodium n-propoxide, sodium isopropoxide, sodium n-butoxide, sodium sec-butoxide, sodium tert-butoxide, sodium n-pentoxide, sodium neopentoxide, sodium methoxyethoxide, sodium ethoxyethoxide, sodium benzyloxide, sodium 1-phenylethoxide, and alkali metal alkoxides derived from monools in which sodium is substituted by lithium, potassium; disodiumethyilene dioxide, disodiummethylethylene dioxide, disodium 1,2-dimethylethylene dioxide, disodiumtetramethylethylene dioxide, disodiumphenyethylene dioxide, disodium1,2-diphenylethylene dioxide, disodiumtetraphenylethylene dioxide, disodiumcyclopentane-1,2-dioxide, disodiumcyclohexane-1,2-dioxide, disodiumpropylene-1,3-dioxide, disodium 1,3-dimethylpropylene-1,3-dioxide, disodium1,3-diphenylpropylene-1,3-dioxide, and alkali metal alkoxides derived from diols in which sodium is optionally substituted by lithium, potassium, and all steric and optical isomers thereof. These are not only commercially available but also can be produced by reacting an alcohol compound with the alkali metal compounds. Examples of the alcohols of the formula ( III' ) include monools such as methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, tert-butanol, n-pentanol, neopentyl alcohol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, benzyl alcohol and 1-phenylethanol, and diols such as ethylene glycol, propylene glycol, 2,3-butanediol, tetramethylethylene glycol, phenylethylene glycol, hydrobenzoin, tetraphenylethylene glycol, cyclopentane-1,2-diol, cyclohexane-1,2-diol, 1,3-propanediol, 2,4-pentanediol, 1,3-diphenyl-1,3-propanediol and tartaric acid and all steric and optical isomers thereof. The amine compound is used as a dehydrohalogenating agent and is not particularly restricted, and examples thereof include primary amines such as aniline, chloroaniline, bromoaniline, fluoroaniline, toluidine, anisidine, naphthylamine, benzylamine, propylamine, butylamine and pentylamine, secondary amines such as N-methylaniline, N-ethylaniline, diphenylamine, N-methylchloroaniline, N-methylbromoaniline, N-methylfluoroaniline, pyrrolidine, morpholine and piperidine, tertiary amines such as trimethylamine, triethylamine, diiosopropylethylamine, N,N-dimethylaniline, N,N-dimethylchloroaniline, N,N-dimethylbromoaniline, N,N-dimethylfluoroaniline, N-methylpyrrolidine, N-methylmorpholine, N-methylpiperidine, 1,4-diazabicyclo[2,2,2]octane, 1,5-diazabicyclo[4.3.0]non-5-ne and 1,8-diazabicyclo[5,4,0]undec-7-ene and piridines such as piridine, N,N-dimethylaminopiridine, picoline and pipecoline. Examples of the alkali metal aryloxides ( V ) include lithium phenoxide, lithium 2-methylphenoxide, lithium 3-methylphenoxide, lithium 4-methylphenoxide, lithium 2,3-dimethylphenoxide, lithium 2,4-dimethylphenoxide, lithium 2,5-dimethylphenoxide, lithium 2,6-dimethylphenoxide, lithium 3,4-dimethylphenoxide, lithium 2,3,4-trimethylphenoxide, lithium 2,3,5-trimethylphenoxide, lithium 2,3,6-trimethylphenoxide, lithium 3,4,5-trimethylphenoxide, lithium 2,4,6-trimethylphenoxide, lithium 2,3,4,5-tetramethylphenoxide, lithium 2,3,4,6-tetramethylphenoxide, 2,3,5,6-tetramethylphenoxide, lithium pentamethylphenoxide, lithium ethylphenoxide, lithium n-propylphenoxide, lithium isopropylphenoxide, lithium n-butylphenoxide, lithium sec-butylphenoxide, litihum tert-butylphenoxide, lithium n-pentylphenoxide, lithium neopentylphenoxide, lithium n-hexylphenoxide, lithium n-octylphenoxide, lithium n-decylphenoxide, lithium n-dodecylphenoxide, lithium n-tetradecylphenoxide, lithium naphthyloxide, lithium anthracenyloxide; and compounds obtained by substituting sodium, potassium for lithium on these compounds; further, alkali metal haloaryloxides obtained by substitution with halogen such as fluorine, chlorine and bromine on these compounds; and alkali metal alkoxyaryloxides obtained by optional substitution by a methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, sec-butoxy group or tert-butoxy group for a halogen atom on the above-described haloalkyl groups; alkali metal cyanoaryloxides obatined by substitution by a cyano group for the halogen atom of the haloaryloxides above; and alkali metal nitroaryloxides obatined by substitution by a nitro group for the halogen atom of the haloaryloxides above; and preferable examples thereof include lithium phenoxide, litium4-methylphenoxide, lithium 2,4,6-terimethylphenoxide, sodium phenoxide, sodium 4-methylphenoxide and sodium 2,4,6-trimethylphenoxide. Examples of the compound in which substituents Ars bond mutually to form a ring include dilithium 1,1'-biphenyl-2,2'-dioxide, dilithium 1,1'-biphenyl-4,4'-dimethyl-2,2'-dioxide, dilithium 1,1'-biphenyl-6,6'-dimethyl-2,2'-dioxide, dilithium 1,1'-biphenyl-3,3'-di-tert-butyl-2,2'-dioxide, dilithium 1,1'-bibinaphthyl-2,2'-dioxide, dilithium 1,1'-bibinaphthyl-3,3'-bis(trimethylsilyl)-2,2'-dioxide, dilithium 1,1'-thiobiphenyl-2,2'-dioxide, dilithium 1,1'-thiobiphenyl-5,5'-dimethyl-2,2'-dioxide, dilithium 1,1'-thiobiphenyl-3,3'-di-tert-butyl-5,5'-dimethyl-2,2'-dioxide, dilithium 1,1'-methylenebiphenyl-2,2'-dioxide, dilithium 1,1'-methylenebiphenyl-5,5'-dimethyl-2,2'-dioxide, dilithium 1,1'-methylenebiphenyl-3,3'-di-tert-butyl-5,5'-dimethyl-2,2'-dioxide, dilithium 1,1'-phenylphosphinobiphenyl-2,2'-dioxide, dilithium 1,1'-phenylphosphinobiphenyl-5,5'-dimethyl-2,2'-dioxide, dilithium 1,1'-phenylphosphinobiphenyl-3,3'-di-tert-butyl-5,5'-dimethyl-2,2'-dioxide, and alkali metal biaryloxides derived from biarylhydroxides in which lithium is.substituted by potassium or sodium. These are not only commercially available but also can be produced by reacting the arylhydroxide compound with the alkali metal compounds. Examples of the alkali metal amides ( VII ) include lithium dimethylamide, lithium diethylamide, lithium di-n-propylamide, lithium diisopropylamide, lithium di-n-butylamide, lithium di-n-pentylamide, lithium dineopentylamide, lithium di-n-octylamide, lithium dicyclohexylamide, lithium dicyclopentylamide, lithium dibenzylamide, lithium ditolylmethylamide, lithium N-methylanilide, lithium N-ethylanilide, lithium diphenylamide, lithium ditolylamide, lithium pyrrolidide, lithium 2,5-dimethylpyrrolide, lithium 2,2,5,5-tetramethylpyrrolide, lithium piperidide, lithium 2,6-dimethylpiperidide, lithium 2,2,6,6-tetramethylpiperidide, lithium azetidide, and compounds obtained by substituting sodium, potassium for lithium on the above-described compounds. These are not only commercially available but also can be produced by reacting an amine compound with the alkali metal compounds. Production of an alkoxytitanium complex is not particularly restricted, and Method A can be preferably conducted by reacting the halogenated titanium complex ( II ) with the alkali metal alkoxides ( III ) and Method B can be preferably conducted by reacting the halogenated titanium complex ( II ) with the alcohols ( III' ), optionally in the presene of an amine, respectively under inert atmosphere such as nitrogen or argon in the presence of a solvent. Charge ratio of the alkali metal alkoxides ( III ) to the halogenated titanium complex ( II ) in Method A is usually from 0.5 to 14-fold by mol, preferably from 0.8 to 3-fold by mol. Charge ratio of the alcohols ( III' ) to the halogenated titanium complex ( II ) in Method B is usually from 0.5 to 10-fold by mol, preferably from 0.8 to 3-fold by mol, and charge ratio of an amine to the halogenated titanium complex ( II ) in Method B is usually from 0.5 to 5-fold by mol, preferably from 0.8 to 3-fold by mol. The solvent is not particularly restricted, examples thereof include aliphatic hydrocarbons such as pentane, hexane, heptane, octane and decane, aromatic hydrocarbons such as benzene, toluene, xylene and mesitylene, aliphatic halogenated hydrocarbons such as dichloromethane, chloroform and dichloroethane, aromatic halogenated hydrocarbons such as monochlorobenzene and dichlorobenzene, ethers such as diethyl ether, dibutyl ether, methyl t-butyl ether and tetrahydrofuran and the alcohols corresponding to the alkali metal alkoxides ( III ), and mixtures thereof. The amount used thereof is usually from 1 to 200-fold by weight, preferably from 3 to 30-fold by weight based on the halogenated titanum complex ( II ) in both Method A and Method B. Reaction method for producing an aryloxytitanium complex is not particularly restricted, and it can be preferably conducted by reacting the halogenated titanium complex ( II ) with the alkali metal aryloxides ( V ) under inert atmosphere such as nitrogen or argon in the presence of a solvent. Charge ratio of the alkali metal aryloxides ( V ) to the halogenated titanium complex ( II ) is usually from 0.5 to 10-fold by mol, preferably from 0.8 to 3-fold by mol. The solvent is not particularly restricted, examples thereof include aliphatic hydrocarbons such as pentane, hexane, heptane, octane and decane, aromatic hydrocarbons such as benzene, toluene, xylene and mesitylene, aliphatic halogenated hydrocarbons such as dichloromethane, chloroform and dichloroethane, aromatic halogenated hydrocarbons such as monochlorobenzene and dichlorobenzene, and , ethers such as diethyl ether, dibutyl ether, methyl t-butyl ether and tetrahydrofuran and mixtures thereof. The amount used thereof is usually from 1 to 200-fold by weight, preferably from 3 to 30-fold by weight based on the halogenated titanium complex ( II ). Reaction method for producing an aminotitanium complex is not particularly restricted, and it can be preferably conducted by reacting the halogenated titanium complex ( II ) with the alkali metal amides ( VII ) under inert atmosphere such as nitrogen or argon: in the presence of a solvent. Use ratio by mol of the alkali metal amides ( VII ) to the halogenated titanium complex ( II ) is usually from 0.5 to 10-fold by mol, preferably from 0.8 to 3-fold by mol. The solvent is not particularly restricted, examples thereof include aliphatic hydrocarbons such as pentane, hexane, heptane, octane and decane, aromatic hydrocarbons such as benzene, toluene, xylene and mesitylene, aliphatic halogenated hydrocarbons such as dichloromethane, chloroform and dichloroethane, aromatic halogenated hydrocarbons such as monochlorobenzene and dichlorobenzene, and ethers such as diethyl ether, dibutyl ether, methyl t-butyl ether and tetrahydrofuran. The amount used thereof is usually from 1 to 200-fold by weight, preferably from 3 to 30-fold by weight based on the halogenated titanum complex ( II ). The reaction temperature is usually from -100°C to the boiling point of a solvent, and preferably from -80°C to 30°C. After the reaction, the alkoxytitanium complex ( I ), aryloxytitanium complex ( IV ) or aminotitanium complex ( VI ) can be obtained by, for example, removing insoluble solids and distilling off a solvent. If necessary, the product can be purified by a conventional method such as recrystallization and sublimation. According to the present invention, an alkoxytitanium complex ( I ), an aryloxytitanium complex ( IV ) or an aminotitanium complex ( VI ) can be produced industrially advantageously. Example The following examples further illustrate the present invention in detail, but do not limit the present invention. Example 1 Synthesis of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide In a schlenk tube, 0.131 g (4.1 mmol) of methanol was dissolved in 10 ml of anhydrous ether, and to this solution was added 1.05 M methyllithium ether solution (3.9 ml, 4.1 mmol) dropwise at -78°C. The mixture was heated to 20°C, production of lithium methoxide was confirmed by checking completion of gas evolution, and the mixture was cooled again to -78°C. A suspension of 0.919g (2.0 mmol) of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride in 20 ml of anhydrous ether previously prepared in another schlenk tube was transferred into the above-described reaction solution, then, the mixture was allowed to warm to room temperature gradually. The reaction solution was concentrated, then, to this was added 20 ml of toluene, and insoluble components were filtrated. The filtrate was concentrated to obtain (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide as yellow crystals (0.86 g, 95%). 1 H NMR (270 MHz, C 6 D 6 ) δ 7.26 (m, 2H), 4.13 (s, 6H), 2.33 (s, 3H), 1.97 (s, 6H), 1.89 (s, 6H), 1.59 (s, 9H), 0.55 (s, 6H) Example 2 Synthesis of (η5-tetramethylcyclopentadienyl) (3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide In a schlenk tube, 4.59 g (10.0 mmol) of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride was suspended in 42 ml of toluene, to this was added 28% sodium methylate methanol solution (4.05 g, 21.0 mmol) dropwise at -78°C, then, the mixture was allowed to warm to room temperature gradually. The reaction solution was concentrated, then, to this was added 50 ml of toluene, and insoluble components were filtrated. The filtrate was concentrated to obtain (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide as yellow crystals (4.33 g, 96%). Example 3 Synthesis of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide In a schlenk tube, 0.40 g (12.5 mmol) of methanol and 2.53 g (25.0 mmol) of triethylamine were dissolved in 30 ml of toluene, to this was added 2.30 g (5.0 mmol) of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride portionwise at -78°C with stirring, then, the mixture was allowed to warm to room temperature and stirred for 10 hours. Insoluble components were filtrated, and the residue was washed with 20 ml of toluene. The filtrate was concentrated to obtain (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dimethoxide as yellow crystals (1.74 g, 80%). Example 4 Synthesis of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium diisopropoxide In a schlenk tube, 0.246 g (4.1 mmol) of isopropanol was dissolved in 10 ml of anhydrous ether, and to this solution was added 1.05 M methyllithium ether solution (3.9 ml, 4.1 mmol) dropwise at -78°C. The mixture was heated to 20°C, production of lithium isopropoxide was confirmed by checking completion of gas evolution, and the mixture was cooled again to -78°C. A suspension of 0.919g (2.0 mmol) of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride in 20 ml of anhydrous ether previously prepared in another schlenk tube was transferred into the above-described reaction solution, then, the mixture was allowed to warm to room temperature gradually. The reaction solution was concentrated, then, to this was added 20 ml of toluene, and insoluble components were filtrated. The filtrate was concentrated to obtain (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium diisopropoxide as yellow crystals (0.98 g, 96%). 1 H NMR (270 MHz, C 6 D 6 ) δ 7.29 (m, 2H), 4.75 (m, 2H), 2.31 (s, 3H), 2.02 (s, 6H), 1.93 (s, 6H), 1.58 (s, 9H), 1.18 (m, 12H), 0.60 (s, 6H) Example 5 Synthesis of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium di-t-butoxide In a schlenk tube, 0.55 g (1.2 mmol) of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride was suspended in 3 ml of toluene, to this was added 0.24 g (2.5 mmol) of t-butoxysodium at 0°C. The mixture was heated to 20°C, stirred for 1 hour, then, refluxed for 8 hours. After completion of the reaction, the mixture was cooled to room temperature, and insoluble components were removed by filtration. The filtrate was concentrated to obtain (η 5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium di-t-butoxide as yellow crystals (0.49 g, 77%). 1 H NMR (270 MHz, C 6 D 6 ) δ 7.28 (d, 1H), 7.16 (d, 1H), 2.32 (s, 3H), 2.05 (s, 6H), 1.97 (s, 6H), 1.59 (s, 9H), 1.35 (s, 18H), 0.64 (s, 6H) Example 6 Synthesis of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium (ethylene dioxide) In a schlenk tube, ethylene glycol (4.26 g, 68.6 mmol) was dissolved in 10 ml of anhydrous ether, and to this solution was added 1.05 M methyllithium ether solution (3.9 ml, 4.1 mmol) dropwise at -78°C. The mixture was heated to 20°C, production of dilithiumethylene dioxide was confirmed by checking completion of gas evolution, and the mixture was cooled again to -78°C. A suspension of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride (30.0 g, 65.3 mmol) in 100 ml of anhydrous ether previously prepared in another schlenk tube was transferred into the above-described reaction solution, then, the mixture was allowed to warm to room temperature gradually. The reaction solution was concentrated, then, to this was added 200 ml of toluene, the resulting mixture was stirred for 2 hours at 100°C, then insoluble components were filtrated. The filtrate was concentrated, and recrystallized from toluene to obtain (η 5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium (ethylene dioxide) as yellow crystals(8.51 g, 28%). 1 H NMR (270 MHz, C 6 D 6 ) δ 7.31 (1H), 7.28 (1H), 4.54 (2H), 4.16 (2H), 2.35 (s, 3H), 2.25 (s, 3H), 2.08 (s, 3H), 1.85 (s, 3H), 1.75 (s, 3H), 1.63 (s, 9H), 0.78 (s, 3H), 0.55 (s, 3H) Example 7 Synthesis of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium methoxyethoxide In a schlenk tube, ethylene glycol monomethyl ether (1.56 g, 20.5 mmol) was dissolved in 50 ml of anhydrous ether, and to this solution was added 1.05 M methyllithium ether solution (19.5 ml, 20.5 mmol) dropwise at -78°C. The mixture was heated to 20°C, production of lithium methoxyethoxide was confirmed by checking completion of gas evolution, and the mixture was cooled again to -78°C. A suspension of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride (4.59 g, 10.0 mmol) in 30 ml of anhydrous ether previously prepared in another schlenk tube was transferred into the above-described reaction solution, then, the mixture was allowed to warm to room temperature gradually. The reaction solution was concentrated, then, to this was added 20 ml of toluene, and insoluble components were filtrated. The filtrate was concentrated, and recrystallized from hexane to obtain (η 5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium methoxyethoxide as yellow crystals (2.18 g, 40%). 1 H NMR (270MHz, C 6 D 6 ) δ 7.28 (2H) , 4.48 (4H) , 3.36 (4H), 3.18 (s, 6H), 2.32 (s, 3H), 2.05 (s, 12H), 1.55 (s, 9H), 0.60 (s, 6H) Example 8 Synthesis of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium ((+)-1,2-diphenylethylene-1,2-dioxide) In a schlenk tube, 0.64 g (3.0 mmol) of (+)-hydrobenzoin and 1.01 g (10.0 mmol) of triethylamine were dissolved in 30 ml of toluene, to this was added 1.38 g (3.0 mmol) of (η 5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride portionwise at -78°C with stirring, then, the mixture was allowed to warm to room temperature and stirred for 10 hours. Insoluble components were filtrated, and the residue was washed with 20 ml of toluene. The filtrate was concentrated to obtain (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium ((+)-1,2-diphenylethylene-1,2-dioxide) as yellow crystals (1.60 g, 89%). 1 H NMR (270 MHz, C 6 D 6 ) δ 7.45 - 7.03 (10H), 6.93 (1H), 6.45 (1H), 2.45 (s, 3H), 2.33 (s, 3H), 2.30 (s, 2H), 2.16 (2, 3H), 2.06 (s, 3H), 1.95 (s, 3H), 1.75 (s, 9H), 0.58 (s, 3H), 0.55 (s, 3H) Example 9 Synthesis of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide In a schlenk tube, 1.976 g (21 mmol) of phenol was dissolved in 30 ml of toluene, and to this solution was added 1.60 M n-butyllithium hexane solution (13.1 ml, 21 mmol) dropwise at -78°C. The mixture was heated to 20°C, production of lithium phenoxide was confirmed by checking completion of gas evolution, and the mixture was cooled again to -78°C. A suspension of 4.59 g (10.0 mmol) of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride in 20 ml of toluene previously prepared in another schlenk tube was transferred into the above-described reaction solution, then, the mixture was allowed to warm to room temperature gradually. Insoluble components were filtrated, then, the filtrate was concentrated to obtain (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium diphenoxide as yellow crystals (4.91 g, 85%). 1 H NMR (270 MHz, C 6 D 6 ) δ 6.68 - 7.42 (m, 12H), 2.48 (s, 3H), 2.15 (s, 6H), 2.03 (s, 6H), 1.56 (s, 9H), 0.55 (s, 6H) Example 10 Synthesis of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium ((+)-1,1'-binaphthyl-2,2'-oxide) In a schlenk tube, 0.859 g (3.0 mmol) of (+)-BINOL was dissolved in 20 ml of THF, and to this solution was added 1.60 M n-butyllithium hexane solution (4.38 ml, 7.0 mmol) dropwise at -78°C. The mixture was heated to 20°C, production of dilithium (+)-1,1'-binaphthyl-2,2'-oxide was confirmed by checking completion of gas evolution, and the mixture was cooled again to -78°C. A suspension of 1.38 g (3.0 mmol) of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride in 10 ml of toluene previously prepared in another schlenk tube was transferred into the above-described reaction solution, then, the mixture was allowed to warm to room temperature gradually. Insoluble components were filtrated, then, the filtrate was concentrated to obtain (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium ((+)-1,1'-binaphthyl-2,2'-oxide) as yellow crystals (1.49 g, 74%). 1 H NMR (270 MHz, C 6 D 6 ) δ 6.85 - 7.85 (m, 14H), 2.28 (s, 3H), 2.24 (s, 3H), 2.08 (s, 3H), 1.96 (s, 3H), 1.52 (s, 3H), 0.90 (s, 9H), 0.75 (s, 3H), 0.62 (s, 3H) Example 11 Synthesis of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium bisdiethylamide In a schlenk tube, 0.300 g (4.1 mmol) of diethylamine was dissolved in 10 ml of ether, and to this solution was added 1.05 M methyllithium ether solution (3.9 ml, 4.1 mmol) dropwise at -78°C. The mixture was heated to 20°C, production of lithiumdiethylamide was confirmed by checking completion of gas evolution, and the mixture was cooled again to -78°C. A suspension of 0.919 g (2.0 mmol) of (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy)dimethylsilanetitanium dichloride in 20 ml of ether previously prepared in another schlenk tube was transferred into the above-described reaction solution, then, the mixture was allowed to warm to room temperature gradually. The reaction solution was concentrated, then, to this was added 20 ml of toluene, and insoluble components were filtrated. The filtrate was concentrated to obtain (η5-tetramethylcyclopentadienyl)(3-tert-butyl-5-methyl-2-phenoxy) dimethylsilanetitanium bis (diethylamide) as a black violet oil (1.03 g, 97%). 1 H NMR (270 MHz, C 6 D 6 ) δ 7.35 (m, 2H), 3.77 (m, 2H), 3.56 (m, 2H), 2.33 (s, 3H), 2.03 (s, 6H), 2.00 (s, 6H), 1.69 (s, 9H), 0.95 (m, 12H), 0.55 (s, 6H), 9H) , 0.58 (s, 3H), 0.55 (s, 3H)

Claims: A method for producing an alkoxytitanium complex represented by the general formula (I) : wherein Cp is a group having a cyclopentadiene-type anion skeleton, A represents a carbon atom or silicon atom; R 1 , R 2 , R 3 and R 4 each independently represent: a hydrogen atom; a halogen atom; an alkyl group having 1 to 10 carbon atoms which optionally may be substituted by fluorine, an alkoxy group having 1 to 10 carbon atoms which may be substituted by fluorine; an aryl group having 6 to 20 carbon atoms which may be substituted by fluorine; an aryloxy group having 6 to 20 carbon atoms which may be substituted by fluorine; an aralkyl group having 7 to 20 carbon atoms which may be substituted by fluorine; an aralkyloxy group having 7 to 20 carbon atoms which may be substituted by fluorine; a hydrocarbon-substituted silyl group having 1 -to 20 carbon atoms; or a hydrocarbon-substituted amino group having 1 to 20 carbon atoms; R 5 and R 6 each independently represent: a hydrogen atom; an alkyl group having 1 to 10 carbon atoms which optionally may be substituted by fluorine; an alkoxy group having 1 to 10 carbon atoms which may be substituted by fluorine; an aryl group having 6 to 20 carbon atoms which may be substituted by fluorine; an aryloxy group having 6 to 20 carbon atoms which may be substituted by fluorine; an aralkyl group having 7 to 20 carbon atoms which may be substituted by fluorine; an aralkyloxy group having 7 to 20 carbon atoms which may be substituted by fluorine; a hydrocarbon-substituted silyl group having 1 to 20 carbon atoms; or a hydrocarbon-substituted amino group having 1 to 20 carbon atoms; and R 7 is the same or different and each independently represents: an alkyl group having 1 to 10 carbon atoms which may be substituted; or an aralkyl group having 7 to 20 carbon atoms which may be substituted; or R 7 groups may bond to each other to form a ring, which comprises reacting: a halogenated titanium complex represented by the general formula (II) wherein Cp, A, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are the same as defined above, and X 1 and X 2 each independently represent a halogen atom; with an alkali metal alkoxide of the formula (III) : R 7 OM wherein M represents an alkali metal and R 7 is the same as defined above. The method according to Claim 1, which comprises: reacting a halogenated titanium complex of the formula (II) with an alcohol of the formula (III') : R 7 OH wherein R 7 is the same as defined in claim 1. The method according to Claim 2, wherein the reaction is conducted in the co-existence of an amine. A method for producing an aryloxytitanium complex represented by the general formula ( IV ): wherein Cp, A, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 have respectively the same meanings as defined in claim 1, and Ar is the same or different and each represents an aryl group having 6 to 20 carbon atoms which may be substituted, or Ars may bond mutually to form a ring, which comprises reacting a halogenated titanium complex represented by the general formula ( II ) as defined in claim 1 with an alkali metal aryloxide represented by the general formula ( V ): ArOM wherein M represents an alkali metal atom, and Ar is the same as defined above. A method for producing an aminotitanium complex represented by the general formula (VI): wherein Cp, A, R 1 , R 2 , R 3 , R 4 , R 5 and R 6 have respectively the same meanings as defined in claim 1, and R 9 and R 10 each independently represent an alkyl group having 1 to 10 carbon atoms which may be substituted, an aralkyl group having 7 to 20 carbon atoms which may be substituted; or a silyl group having 1 to 20 carbon atoms which may be substituted, or R 9 and R 10 may bond to each other to form a ring which comprises reacting a halogenated titanium complex represented by the general formula (II) as defined in claim 1 with an alkali metal amide represented by the general formula (VII) : R 9 R 10 NM wherein M represents an alkali metal atom, and R 9 and R 10 are the same as defined above.

Inventors: HANAOKA HIDENORI, ODA YOSHIAKI, SOHDA HIROSHI, HANAOKA, HIDENORI, ODA, YOSHIAKI, SOHDA, HIROSHI
Applicants: SUMITOMO CHEMICAL CO, SUMITOMO CHEMICAL COMPANY, LIMITED
Application year: 1999
Main classification: C07F17
IPC codes: C07F17