US4668773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organolanthanide catalysts
Assignee: Northwestern University
•
Filing: 1985-03-25
•
Granted: 1987-05-26
•
Expires: 2005-03-25
Abstract
Abstract The reaction of the organolanthanide complexes [η 5 --(CH 3 ) 5 C 5 ] 2 MCl 2 - Li((C 2 H 5 ) 2 O) 2 + , M=La, Nd, Sm, Lu, with LiCH[Si(CH 3 ) 3 ] 2 provides a straight-forward route to ether-free and halide-free bis(pentamethylcyclopentadienyl) lanthanide alkyls, (η 5 (CH 3 ) 5 C 5 ) 2 MCH--[Si(CH 3 ) 3 ] 2 . The (η 5 (CH 3 ) 5 C 5 ) 2 NdCH[Si(CH 3 ) 3 ] 2 complexes react with H 2 under mild conditions to yield the corresponding hydrides [(η 5 (CH 3 ) 5 C 5 ) 2 MH] 2 . These complexes have been found to be extremely active homogeneous olefin polymerization catalysts, as well as catalysts for olefin and acetylene hydrogenation.
Inventors
- 👤 Tobin J. Marks
- 👤 Heiko Mauermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:20
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/1608; B01J31/22; B01J31/2282; B01J31/2295; C; C07; C07C; C07C5/00; C07C5/02; C07C5/03; C07F; C07F17/00; C07F5/00; C07F7/00; C07F7/02; C07F7/025; C08; C08F; C08F10/00; B01J2531/00; B01J2531/02; B01J2531/0202; B01J2531/0205; B01J2531/30; B01J2531/37; B01J2531/38; C07C2531/00; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
47 words
An organolanthanide of the formula [η 5 -(CH 3 ) 5 C 5 ] 2 MR where M is selected from the group consisting of the Lanthanide Series elements, and R is selected from the group consisting of mesitylene and CH(Si(CH 3 ) 3 ) 2 .
Claim 2
Dependent Claim
47 words
An organolanthanide of the formula [η 5 -(CH 3 ) 5 C 5 ] 2 MR where M is selected from the group consisting of the Lanthanide Series elements, and R is selected from the group consisting of mesitylene and CH(Si(CH 3 ) 3 ) 2 .
Claim 3
Dependent Claim
35 words
A lanthanide alkyl of the formula [η 5 -(CH 3 ) 5 C 5 ] 2 MCH[Si(CH 3 ) 3 ] 2 wherein M is selected from the group consisting of the Lanthanide Series elements.
Claim 4
Dependent Claim
35 words
A lanthanide alkyl of the formula [η 5 -(CH 3 ) 5 C 5 ] 2 MCH[Si(CH 3 ) 3 ] 2 wherein M is selected from the group consisting of the Lanthanide Series elements.
Claim 5
Dependent Claim
20 words
The lanthanide alkyl of claim 2 wherein M is selected from the group consisting of La, Nd, Sm and Lu.
Claim 6
Dependent Claim
39 words
An organolanthanide of the formula [(η 5 (CH 3 ) 5 C 5 ) 2 MH] 2 where M is selected from the group consisting of La, Ce, Pr, Nd, Pm, Eu, Gd, Tb, Dy, Ho, Er and Tm.
Claim 7
Dependent Claim
39 words
An organolanthanide of the formula [(η 5 (CH 3 ) 5 C 5 ) 2 MH] 2 where M is selected from the group consisting of La, Ce, Pr, Nd, Pm, Eu, Gd, Tb, Dy, Ho, Er and Tm.
Claim 8
Independent Claim
60 words
A method for preparing (Cp 2 'MH) 2 comprising the steps of contacting a lanthanide compound selected from the group consisting of Cp 2 'MCH[Si(CH 3 ) 3 ] 2 and 2-(Cp 2 'M)mesitylene, with H 2 , wherein Cp'=η 5 -(CH 3 ) 5 C 5 and M is selected from the group consisting of the Lanthanide Series elements.
Claim 9
Independent Claim
60 words
A method for preparing (Cp 2 'MH) 2 comprising the steps of contacting a lanthanide compound selected from the group consisting of Cp 2 'MCH[Si(CH 3 ) 3 ] 2 and 2-(Cp 2 'M)mesitylene, with H 2 , wherein Cp'=η 5 -(CH 3 ) 5 C 5 and M is selected from the group consisting of the Lanthanide Series elements.
Claim 10
Independent Claim
79 words
A method for the preparation of [η 5 (CH 3 ) 5 C 5 ] 2 MCH[Si(CH 3 ) 3 ] 2 comprising the steps of mixing [η 5 (CH 3 ) 5 C 5 ] 2 MCl 2 -Li((C 2 H 5 ) 2 O) 2 + with approximately an equimolar amount of LiCH(Si(CH 3 ) 3 ) 2 in a solvent, and removing said solvent, wherein M is selected from the group consisting of the lanthanide elements.
Claim 11
Independent Claim
79 words
A method for the preparation of [η 5 (CH 3 ) 5 C 5 ] 2 MCH[Si(CH 3 ) 3 ] 2 comprising the steps of mixing [η 5 (CH 3 ) 5 C 5 ] 2 MCl 2 -Li((C 2 H 5 ) 2 O) 2 + with approximately an equimolar amount of LiCH(Si(CH 3 ) 3 ) 2 in a solvent, and removing said solvent, wherein M is selected from the group consisting of the lanthanide elements.
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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |