Patent US4042610A successfully refreshed from Google Patents.
US4042610A
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Process for preparing hydrocarbyl and silahydrocarbyl transition metal dihydrocarbylamides
Assignee: EIDP Inc
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Filing: 1975-09-22
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Granted: 1977-08-16
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Expires: 1995-09-22
Abstract
Abstract A poly(dihydrocarbylamide) of a transition metal of groups IV, V or VI is reacted with a hydrocarbyllithium or a silahydrocarbyllithium in a solvent and a hydrocarbyl- or silahydrocarbyl(transition metal) dihydrocarbylamide is recovered. Exemplary is the process of dissolving vanadium tetrakis(dimethylamide) in pentane and adding trimethylsilylmethyllithium to obtain bis (trimethylsilylmethyl)vanadium bis(dimethylamide).
Inventors
- 👤 Leo Ernest Manzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:57
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/02; C07; C07F; C07F11/00; C07F7/00; C07F7/28; C07F9/00; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/639; C08F4/63912
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
113 words
The process of reacting a poly(dihydrocarbylamide) of a transition metal having the formula M(NR 2 ) x with yR'Li in a solvent in which both reactants are soluble to produce a compound of the formula R' y M(NR 2 ) x-y and a by-product of the formula LiNR 2 which in insoluble in the solvent wherein M is titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum or tungsten; R is alkyl, aryl or aralkyl; R' is alkyl, silaalkyl in which the silicon is bonded solely to carbon, aralkyl or diarylmethyl; x is the valence of the metal and is at least 3; y is 1 to 5; and x-y is at least 1.
Claim 2
Dependent Claim
113 words
The process of reacting a poly(dihydrocarbylamide) of a transition metal having the formula M(NR 2 ) x with yR'Li in a solvent in which both reactants are soluble to produce a compound of the formula R' y M(NR 2 ) x-y and a by-product of the formula LiNR 2 which in insoluble in the solvent wherein M is titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum or tungsten; R is alkyl, aryl or aralkyl; R' is alkyl, silaalkyl in which the silicon is bonded solely to carbon, aralkyl or diarylmethyl; x is the valence of the metal and is at least 3; y is 1 to 5; and x-y is at least 1.
Claim 3
Dependent Claim
16 words
The process of claim 1 in which the solvent is a liquid alkane or liquid cycloalkane.
Claim 4
Dependent Claim
11 words
The process of claim 2 in which the solvent is pentane.
Claim 5
Dependent Claim
14 words
The process of claim 1 in which R has a maximum of 10 carbons.
Claim 6
Dependent Claim
15 words
The process of claim 1 in which R is alkyl of up to 4 carbons.
Claim 7
Dependent Claim
24 words
The process of claim 1 in which R' has a maximum of 11 carbons and in which the aryl groups contain 6-10 carbons each.
Claim 8
Dependent Claim
14 words
The process of claim 1 in which the transition metal reactant is vanadium tetrakis(dimethylamide).
Claim 9
Dependent Claim
14 words
The process of claim 1 in which the transition metal reactant is titanium tetrakis(dimethylamide).
Claim 10
Dependent Claim
14 words
The process of claim 1 in which the transition metal reactant is tantalum tetrakis(dimethylamide).
Claim 11
Dependent Claim
14 words
The process of claim 1 in which the transition metal reactant is zirconium tetrakis(dimethylamide).
Claim 12
Dependent Claim
14 words
The process of claim 1 in which the transition metal reactant is chromium tetrakis(dimethylamide).
Claim 13
Dependent Claim
14 words
The process of claim 1 in which the transition metal reactant is molybdenum tetrakis(dimethylamide).
Claim 14
Dependent Claim
14 words
The process of claim 1 in which the transition metal reactant is niobium tetrakis(diethylamide).
Claim 15
Dependent Claim
14 words
The process of claim 1 in which the transition metal reactant is hafnium tetrakis(diethylamide).
Claim 16
Dependent Claim
14 words
The process of claim 1 in which the transition metal reactant is tungsten hexakis(dimethylamide).
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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |