EP0344887A2
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Silicon bridged transition metal compounds
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1989-03-17
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Granted: —
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Expires: 2009-03-17
Abstract
Abstract Silicon-bridged transition metal compounds and their use as α-olefin polymerization catalysts are disclosed. A chiral silicon-bridged metallocene catalyst polymerizes α-olefins to high isotacity with a minimum of inversions at high rates of catalyst activity. The catalyst is easily made in high yields and readily separated from atactic meso forms.
Inventors
- 👤 Howard Curtis Welborn
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 16:54
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C08; C08F; C08F10/00; C07F17/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/619; C08F4/61912; C08F4/6192; C08F4/61922; C08F4/61927
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
70 words
Transition metal compound said compound having the formula: wherein M′ is a transition metal; X′ and X˝ are the same or different hydride, halogen, or hydrocarbyl or halohydrocarbyl having up to about 6 carbon atoms; A′ and A˝ are the same or different asymmetrical mononuclear or polynuclear hydrocarbyl or silahydrocarbyl moieties; and S′ is a bridge of 1-4 atoms selected from the group consisting of silanylene, silaalkylene, oxasilanylene and oxasilaalkylene.
Claim 2
Dependent Claim
70 words
Transition metal compound said compound having the formula: wherein M′ is a transition metal; X′ and X˝ are the same or different hydride, halogen, or hydrocarbyl or halohydrocarbyl having up to about 6 carbon atoms; A′ and A˝ are the same or different asymmetrical mononuclear or polynuclear hydrocarbyl or silahydrocarbyl moieties; and S′ is a bridge of 1-4 atoms selected from the group consisting of silanylene, silaalkylene, oxasilanylene and oxasilaalkylene.
Claim 3
Dependent Claim
29 words
Compound of claim 1, wherein M′ is titanium, zirconium or hafnium; and/or wherein X′ and/or X˝ are chlorine, bromine or iodine or alkyl or haloalkyl of 1-6 carbon atoms.
Claim 4
Dependent Claim
54 words
Compound of claim 1 or claim 2, wherein A′ and A˝ have the formula: wherein n is an integer of 1 to 4 and each R′ is the same or different hydrocarbyl or silahydrocarbyl of 1-20 carbon atoms or taken together, two or more of R′ are hydrocarbylene or silahydrocarbylene of 1-20 carbon atoms.
Claim 5
Dependent Claim
24 words
Compound according to any of the preceding claims, wherein each silanylene atom S′ is disubstituted with the same or different lower hydrocarbyl or silahydrocarbyl.
Claim 6
Dependent Claim
11 words
Compound according to any of the preceding claims in racemic mixture.
Claim 7
Dependent Claim
137 words
Chiral transition metal compound substantially free of achiral forms thereof, said compound having the formula: wherein M′ is titanium, zirconium or hafnium; X′ and X˝ are the same or different hydride, chlorine, bromine, iodine, or 1-6 carbon-atom alkyl, haloalkyl, aryl or haloaryl; n and m are the same or different integers from 1 to 4; R′ and R˝ are the same or different hydrocarbyl or silahydrocarbyl of 1-20 carbon atoms, and 0-2 silicon atoms, or taken together, two or more of R′ or of R˝ are hydrocarbylene or silahydrocarbylene of 1-20 carbon atoms and 0-2 silicon atoms; and S′ is a chain of 0-4 carbon atoms and 1-2 silicon atoms selected from the group consisting of silanylene, silaalkylene, oxasilanylene and oxasilaalkylene, in which each silicon atom is disubstituted with the same or different lower hydrocarbyl or silahydrocarbyl.
Claim 8
Dependent Claim
137 words
Chiral transition metal compound substantially free of achiral forms thereof, said compound having the formula: wherein M′ is titanium, zirconium or hafnium; X′ and X˝ are the same or different hydride, chlorine, bromine, iodine, or 1-6 carbon-atom alkyl, haloalkyl, aryl or haloaryl; n and m are the same or different integers from 1 to 4; R′ and R˝ are the same or different hydrocarbyl or silahydrocarbyl of 1-20 carbon atoms, and 0-2 silicon atoms, or taken together, two or more of R′ or of R˝ are hydrocarbylene or silahydrocarbylene of 1-20 carbon atoms and 0-2 silicon atoms; and S′ is a chain of 0-4 carbon atoms and 1-2 silicon atoms selected from the group consisting of silanylene, silaalkylene, oxasilanylene and oxasilaalkylene, in which each silicon atom is disubstituted with the same or different lower hydrocarbyl or silahydrocarbyl.
Claim 9
Dependent Claim
45 words
Compound according to claim 6, wherein M′ is titanium; wherein X′ and X˝ are chlorine; wherein R′ and R˝ are butylene, butadienylene, methyl, isobutyl or trimethylsilanyl; and/or wherein S′ is dialkylsilanylene, 1-sila-1,1-dialkyl ethylene, tetraalkyldisilanylene, 2-sila-2,2-dialkyl propylene, 1,3-disila-1,1,3,3-tetraalkyl propylene, dialkylsiloxy (dialkyl) silanylene or 1,4-disila-1, 1,4,4-tetraalkyl butylene.
Claim 10
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(3-methylcyclopentadienyl)] zirconium dichloride.
Claim 11
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(3-methylcyclopentadienyl)] zirconium dichloride.
Claim 12
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(indenyl)] zirconium dichloride.
Claim 13
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(indenyl)] zirconium dichloride.
Claim 14
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Claim 15
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Claim 16
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(3-methylcyclopentadienyl)] zirconium dichloride.
Claim 17
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(3-methylcyclopentadienyl)] zirconium dichloride.
Claim 18
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Claim 19
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Claim 20
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(3-trimethylsilanylcyclopentadienyl)] zirconium dichloride.
Claim 21
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(3-trimethylsilanylcyclopentadienyl)] zirconium dichloride.
Claim 22
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(3-trimethylsilanylcyclopentadienyl)] zirconium dichloride.
Claim 23
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(3-trimethylsilanylcyclopentadienyl)] zirconium dichloride.
Claim 24
Dependent Claim
4 words
Racemic [1,1′-(1,1,3,3-tetramethyldisiloxanylene)-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Claim 25
Dependent Claim
4 words
Racemic [1,1′-(1,1,3,3-tetramethyldisiloxanylene)-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Claim 26
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Claim 27
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] zirconium dichloride.
Claim 28
Dependent Claim
4 words
Racemic [1,1′-(2,2-dimethyl-2-silapropylene)-bis(3-methylcyclopentadienyl)] zirconium dichloride.
Claim 29
Dependent Claim
4 words
Racemic [1,1′-(2,2-dimethyl-2-silapropylene)-bis(3-methylcyclopentadienyl)] zirconium dichloride.
Claim 30
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(3-methylcyclopentadienyl)] hafnium dichloride.
Claim 31
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(3-methylcyclopentadienyl)] hafnium dichloride.
Claim 32
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(indenyl)] hafnium dichloride.
Claim 33
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(indenyl)] hafnium dichloride.
Claim 34
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Claim 35
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Claim 36
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(3-methylcyclopentadienyl)] hafnium dichloride.
Claim 37
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(3-methylcyclopentadienyl)] hafnium dichloride.
Claim 38
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Claim 39
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Claim 40
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(3-trimethylsilanylcyclopentadienyl)] hafnium dichloride.
Claim 41
Dependent Claim
4 words
Racemic [1,1′-dimethylsilanylene-bis(3-trimethylsilanylcyclopentadienyl)] hafnium dichloride.
Claim 42
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(3-trimethylsilanylcyclopentadienyl)] hafnium dichloride.
Claim 43
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(3-trimethylsilanylcyclopentadienyl)] hafnium dichloride.
Claim 44
Dependent Claim
4 words
Racemic [1,1′-(1,1,3,3-tetramethyldisiloxanylene)-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Claim 45
Dependent Claim
4 words
Racemic [1,1′-(1,1,3,3-tetramethyldisiloxanylene)-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Claim 46
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Claim 47
Dependent Claim
4 words
Racemic [1,1′-(1,1,2,2-tetramethyldisilanylene)-bis(4,5,6,7-tetrahydroindenyl)] hafnium dichloride.
Claim 48
Dependent Claim
4 words
Racemic [1,1′-(2,2-dimethyl-2-silapropylene)-bis(3-methylcyclopentadienyl)] hafnium dichloride.
Claim 49
Dependent Claim
4 words
Racemic [1,1′-(2,2-dimethyl-2-silapropylene)-bis(3-methylcyclopentadienyl)] hafnium dichloride.
References Cited (Backward Citations)
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