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US5214173A
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Cyclopentadienyl dicarbollide complexes of titanium, zirconium and hafnium
Assignee: University of Iowa Research Foundation
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Filing: 1991-12-31
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Granted: 1993-05-25
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Expires: 2011-12-31
Abstract
Abstract Novel cyclopentadienyl dicarbollide complexes of titanium, zirconiun and hafnium constitute a new class of neutral, 14-electron, d°, mixed-ring, bent-metallocene alkyl complexes which are useful as polymerization catalysts.
Inventors
- 👤 Richard F. Jordan
- 👤 Donna J. Crowther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:53
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07F; C07F7/00; C07F7/28; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; C08F4/6592
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
27 words
Cyclopentadienyl dicarbollide complex of the formula: (Cp')(C.sub.2 B.sub.9 H.sub.11)M(CH.sub.3) wherein: Cp' is an unsubstituted, alkyl-substituted, or fused ring cyclopentadienyl radical, and M is Ti, Zr or Hf.
Claim 2
Dependent Claim
27 words
Cyclopentadienyl dicarbollide complex of the formula: (Cp')(C.sub.2 B.sub.9 H.sub.11)M(CH.sub.3) wherein: Cp' is an unsubstituted, alkyl-substituted, or fused ring cyclopentadienyl radical, and M is Ti, Zr or Hf.
Claim 3
Dependent Claim
11 words
Cyclopentadienyl dicarbollide complex as in claim 1 wherein M is Zr.
Claim 4
Dependent Claim
11 words
Cyclopentadienyl dicarbollide complex as in claim 1 wherein M is Hf.
Claim 5
Dependent Claim
22 words
Cyclopentadienyl dicarbollide complex as in claim 1 wherein Cp' is C 5 H 5 or C 5 (CH 3 ) 5 .
Claim 6
Dependent Claim
11 words
Cyclopentadienyl dicarbollide complex as in claim 4 wherein M is Zr.
Claim 7
Dependent Claim
11 words
Cyclopentadienyl dicarbollide complex as in claim 4 wherein M is Hf.
Claim 8
Dependent Claim
58 words
A process for producing a cyclopentadienyl dicarbollide complex of the formula (Cp')(C.sub.2 B.sub.9 H.sub.11)M(CH.sub.3) wherein: Cp' is an unsubstituted, alkyl-substituted, or fused ring cyclopentadienyl radical, and M is Ti, Zr or Hf, which comprises reacting nido-C 2 B 9 11 13 and a cyclopentadienyl metallocene complex of the formula: (Cp')M(CH.sub.3).sub.3 wherein Cp' and M are as above defined.
Claim 9
Dependent Claim
58 words
A process for producing a cyclopentadienyl dicarbollide complex of the formula (Cp')(C.sub.2 B.sub.9 H.sub.11)M(CH.sub.3) wherein: Cp' is an unsubstituted, alkyl-substituted, or fused ring cyclopentadienyl radical, and M is Ti, Zr or Hf, which comprises reacting nido-C 2 B 9 11 13 and a cyclopentadienyl metallocene complex of the formula: (Cp')M(CH.sub.3).sub.3 wherein Cp' and M are as above defined.
Claim 10
Dependent Claim
10 words
A process as in claim 7 wherein M is Zr.
Claim 11
Dependent Claim
10 words
A process as in claim 7 wherein M is Hf.
Claim 12
Dependent Claim
21 words
A process as in claim 7 wherein Cp' is C 5 H 4 or C 5 (CH 3 ) 5 .
Claim 13
Dependent Claim
10 words
A process as in claim 10 wherein M is Zr.
Claim 14
Dependent Claim
10 words
A process as in claim 10 wherein M is Hf.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |