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US4155925A
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Hexakis- and dihydridopentakis(phosphite ester)chromiums
Assignee: EIDP Inc
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Filing: 1978-02-16
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Granted: 1979-05-22
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Expires: 1998-02-16
Abstract
Abstract Hexakis(phosphite ester)chromiums of the formula Cr[P(OR).sub.3 ].sub.6 are prepared by chromium-atom evaporation and cocondensation with a phosphite ester. Dihydridopentakis(phosphite ester)chromiums of the formula CrH.sub.2 [P(OR).sub.3 ].sub.5 are prepared by hydrogenation of the corresponding hexakis(phosphite ester)chromiums. Both the hexakis- and the dihydridopentakis(phosphite ester)chromiums are useful as hydrogenation catalysts.
Inventors
- 👤 Steven D. Ittel
- 👤 Chadwick A. Tolman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:50
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07C; C07C5/00; C07C5/02; C07C5/03; C07F11/00; C07F11/005; C07F9/06; C07F9/08; C07F9/141; C07F9/142; C07C2531/00; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
Phosphite ester complexes of chromium of the formula CrH.sub.2n [P(OR).sub.3 ].sub. 6-n where n is 0 or 1 and R is primary or secondary lower alkyl, primary or secondary oxa(lower alkyl), or primary or secondary lower alkyl substituted by a phenyl group on a carbon separated from the phosphorus-bonded oxygen by at least two other carbons.
Claim 2
Dependent Claim
56 words
Phosphite ester complexes of chromium of the formula CrH.sub.2n [P(OR).sub.3 ].sub. 6-n where n is 0 or 1 and R is primary or secondary lower alkyl, primary or secondary oxa(lower alkyl), or primary or secondary lower alkyl substituted by a phenyl group on a carbon separated from the phosphorus-bonded oxygen by at least two other carbons.
Claim 3
Dependent Claim
22 words
The phosphite ester complexes of claim 1 in which n is 0, said complexes being hexakis(phosphite ester)chromiums of the formula Cr[P(OR).sub.3 ].sub.6.
Claim 4
Dependent Claim
12 words
The hexakis(phosphite ester)chromiums of claim 2 in which R is lower alkyl.
Claim 5
Dependent Claim
11 words
The hexakis(phosphite ester)chromium of claim 3 in which R is methyl.
Claim 6
Dependent Claim
12 words
The hexakis(phosphite ester) chromium of claim 3 in which R is ethyl.
Claim 7
Dependent Claim
23 words
The phosphite ester complexes of claim 1 in which n is 1, said complexes being dihydridopentakis(phosphite ester)chromiums of the formula CrH.sub.2 [P(OR).sub.3 ].sub.5.
Claim 8
Dependent Claim
12 words
The dihydridopentakis(phosphite ester)chromiums of claim 6 in which R is lower alkyl.
Claim 9
Dependent Claim
11 words
The dihydridopentakis(phosphite ester)chromium of claim 7 in which R is methyl.
Claim 10
Dependent Claim
11 words
The dihydridopentakis(phosphite ester)chromium of claim 7 in which R is ethyl.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |