US3988332A
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Hydrocarbylidene compounds of niobium and tantalum
Assignee: EIDP Inc
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Filing: 1975-04-21
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Granted: 1976-10-26
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Expires: 1995-04-21
Abstract
Abstract Certain hydrocarbylidene compounds of niobium and tantalum react with oxo compounds to form olefins and are also useful as oxygen scavengers. The compounds can also be used to deposit tantalum or niobium mirrors by thermal decomposition. Exemplary is trineopentyl(neopentylidene)tantalum of the formula [(CH.sub.3).sub.3 CCH.sub.2 ].sub.3 Ta=CHC(CH.sub.3).sub.3.
Inventors
- 👤 Richard Royce Schrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:04
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2265; B01J31/2282; B01J31/2295; B01J31/24; B01J31/2404; B01J31/2409; C; C03; C03C; C03C17/00; C03C17/06; C03C17/09; C07; C07F; C07F9/00; C07F9/02; B01J2231/00; B01J2231/50; B01J2231/52; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/645; B01J2531/00; B01J2531/50; B01J2531/57; B01J2531/58; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/93; Y10S585/931
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
216 words
A compound having the formula ##EQU1## wherein Cp is π-cyclopentadienyl having up to one alkyl substituent; L is P(R 3 ) 3 or (R 3 ) 2 PCH 2 CH 2 P(R 3 ) 2 in which R 3 is alkyl or aryl; Q is alkyl, aralkyl or diarylmethyl in which the β-carbon is not bonded to hydrogen; M is niobium or tantalum; X is F, Cl, Br, I or alkyl, aralkyl or diarylmethyl in which the β-carbon is not bonded to hydrogen; R 1 and R 2 individually are hydrogen, tertiary alkyl or aryl, only one of R 1 and R 2 being tertiary alkyl; alkyl has 1-10 carbons, aralkyl has 7-10 carbons and aryl, including the aryl groups in diarylmethyl, has 6-10 carbons; a, b and c individually are 0, 1 or 2; with the proviso that b is 1 when L is a diphosphine or 2 when L is a monophosphine; and with the further provisos that when a is 2, b and c are each 0; when a is 1, b is 1 or 2, c is 1, Q and X are each CH 3 and R 1 and R 2 are each H; and when a is 0, b is 0, c is 2 and X is the same as Q.
Claim 2
Dependent Claim
216 words
A compound having the formula ##EQU1## wherein Cp is π-cyclopentadienyl having up to one alkyl substituent; L is P(R 3 ) 3 or (R 3 ) 2 PCH 2 CH 2 P(R 3 ) 2 in which R 3 is alkyl or aryl; Q is alkyl, aralkyl or diarylmethyl in which the β-carbon is not bonded to hydrogen; M is niobium or tantalum; X is F, Cl, Br, I or alkyl, aralkyl or diarylmethyl in which the β-carbon is not bonded to hydrogen; R 1 and R 2 individually are hydrogen, tertiary alkyl or aryl, only one of R 1 and R 2 being tertiary alkyl; alkyl has 1-10 carbons, aralkyl has 7-10 carbons and aryl, including the aryl groups in diarylmethyl, has 6-10 carbons; a, b and c individually are 0, 1 or 2; with the proviso that b is 1 when L is a diphosphine or 2 when L is a monophosphine; and with the further provisos that when a is 2, b and c are each 0; when a is 1, b is 1 or 2, c is 1, Q and X are each CH 3 and R 1 and R 2 are each H; and when a is 0, b is 0, c is 2 and X is the same as Q.
Claim 3
Dependent Claim
15 words
A compound of claim 1 where a is 2 and b = c = 0.
Claim 4
Dependent Claim
33 words
A compound of claim 1 where a is 1, b is 1 or 2, c is 1, Q and X are each CH 3 and R 1 and R 2 are each H.
Claim 5
Dependent Claim
21 words
A compound of claim 1 where a = b = 0, c is 2 and X is the same as Q.
Claim 6
Dependent Claim
9 words
A compound of claim 1 where M is niobium.
Claim 7
Dependent Claim
9 words
A compound of claim 1 where M is tantalum.
Claim 8
Dependent Claim
8 words
The compound of claim 1 which is trineopentyl-(neopentylidene)tantalum.
Claim 9
Dependent Claim
9 words
The compound of claim 1 which is trineopentyl (neopentylidene)niobium.
Claim 10
Dependent Claim
8 words
The compound of claim 1 which is dicyclopentadienyl(methyl)(methylene)tantalum.
Claim 11
Dependent Claim
8 words
The compound of claim 1 which is 1,2-bis(dimethylphosphino)ethane(π-cyclopentadienyl)(dimethyl)(methylene)tantalum.
References Cited (Backward Citations)
US3396184A
Cited
US3763197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |