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US4868288A
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Process for preparing metallocene complexes
Assignee: BASF Corp
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Filing: 1988-09-30
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Granted: 1989-09-19
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Expires: 2008-09-30
Abstract
Abstract The invention relates to a process for the preparation of compounds of formula Ia [R.sup.1 FeR.sup.2' ].sup.⊕.sub.q [LQ.sub.m ].sup.q⊖(Ia), wherein R 1 is a π-arene, R 2' is an anion of a π-arene, L is a divalent to heptavalent metal or non-metal, Q is a halogen atom, q is an integer from 1 to 3 and m is an integer corresponding to the valency of L+q, said process comprises reacting an uncharged π-complex of the formula IIIa [(R.sup.2').sub.2 Fe] (IIIa) with a πarene R 1 is in the presence of Al and a Lewis-acid followed by treatment with an acid or a salt of an acid of the anion [LQ m ] q- , the improvement consisting essentially of using TiCl 4 as a Lewis-acid.
Inventors
- 👤 Kurt Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:01
CPC Classifications
C; C08; C08G; C08G85/00; C08L; C08L61/00; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/029
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
In the process for the preparation of a salt of an iron complex of the formula: [R.sup.1 FeR.sup.2' ].sup.+.sub.q [LQ.sub.m ].sup.q- wherein R 1 is a π-arene; R 2' is an anion of a π-arene; L is a divalent to heptavalent metal or non-metal; Q is a halogen atom; q is 1, 2, or 3; and m is the sum of q and the valency of L; in which an uncharged π-complex of the formula: [R.sup.2' FeR.sup.2' ] is allowed to react with a π-arene R 1 in the presence of aluminum and a Lewis acid and the reaction product is treated with a source of the anion [LQ m ] q- , the improvement which comprises employing an effective amount up to a one molar excess of the Lewis acid titanium tetrachloride per mol of said uncharged π-complex.
Claim 2
Dependent Claim
139 words
In the process for the preparation of a salt of an iron complex of the formula: [R.sup.1 FeR.sup.2' ].sup.+.sub.q [LQ.sub.m ].sup.q- wherein R 1 is a π-arene; R 2' is an anion of a π-arene; L is a divalent to heptavalent metal or non-metal; Q is a halogen atom; q is 1, 2, or 3; and m is the sum of q and the valency of L; in which an uncharged π-complex of the formula: [R.sup.2' FeR.sup.2' ] is allowed to react with a π-arene R 1 in the presence of aluminum and a Lewis acid and the reaction product is treated with a source of the anion [LQ m ] q- , the improvement which comprises employing an effective amount up to a one molar excess of the Lewis acid titanium tetrachloride per mol of said uncharged π-complex.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein R 2' is a cyclopentadienyl anion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |