Patent EP0108469B1 successfully refreshed from Google Patents.
EP0108469B1
Expired / Lapsed
EP
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Preparation of organometallic indium and gallium compounds
Assignee: UK Secretary of State for Defence
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Filing: 1983-07-26
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Granted: 1986-10-15
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Expires: 2003-07-26
Abstract
No abstract record available.
Inventors
- 👤 John Brian Mullin
- 👤 Arthur Kenneth Holliday
- 👤 Cole David John Hamilton
- 👤 Anthony Copeland Jones
- 👤 Neil David Gerrard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 10:43
CPC Classifications
C; C07; C07F; C07F3/00; C07F3/02; C07F5/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
A method of producing a polar aprotic liquid adduct M(R 1 ) 3 · L of an organometallic compound M(R 1 ) 3 where M is either indium or gallium and R 1 is an alkyl group having from 1 to 7 carbon atoms comprising electrolysing, using a sacrificial anode of the metal M, a solution containing components 1 and 2 as follows: component 1: one or more organomagnesium halide compounds R'MgX wherein X is a halide radical selected from CI, Br and I and wherein R' is as defined above; component 2: polar aprotic liquid which is a solvent for component 1 and which provides the source of the group L.
Claim 2
Independent Claim
112 words
A method of producing a polar aprotic liquid adduct M(R 1 ) 3 · L of an organometallic compound M(R 1 ) 3 where M is either indium or gallium and R 1 is an alkyl group having from 1 to 7 carbon atoms comprising electrolysing, using a sacrificial anode of the metal M, a solution containing components 1 and 2 as follows: component 1: one or more organomagnesium halide compounds R'MgX wherein X is a halide radical selected from CI, Br and I and wherein R' is as defined above; component 2: polar aprotic liquid which is a solvent for component 1 and which provides the source of the group L.
Claim 3
Dependent Claim
62 words
A method according to claim 1 characterised in that the solution electrolysed additionally contains a third component, component 3, which is one or more organic halides R I X A , where R 1 is as defined in claim 1, X A is a halide radical preferably the same as X, the polar aprotic liquid being a solvent also for component 3.
Claim 4
Dependent Claim
18 words
A method according to claim 2 characterised in that component 3 specified in claim 2 is in excess.
Claim 5
Independent Claim
19 words
A method according to any one claims 1 to 3 characterised in that R 1 is ethyl or methyl.
Claim 6
Independent Claim
44 words
A method according to any one of the preceding claims which comprises, prior to the electrolysis, the step of producing the compound R 1 MgX by addition of excess of the compound R 1 X to a suspension of magnesium in an ethereal solvent.
Claim 7
Independent Claim
27 words
A method according to any one of the preceding claims characterised in that the concentration of component 1 in component 2 is between 0.01 and 5 mole/litre.
Claim 8
Independent Claim
59 words
A method according to any one of the preceding claims characterised in that the polar aprotic liquid is selected from one or more of the solvents: tetrahydrofuran, dioxan, N-methylpyrolidone, diethyl ether, di-n-propyl ether, di-n-butyl ether, di-n-pentyl ether, di-isopentylether, acetonitrile, nitromethane, propylene carbonate, diphenyl ether, and alkyl phenyl ethers having from 1 to 7 carbon atoms in the alkyl group.
Claim 9
Independent Claim
49 words
A method which comprises the production of an organometallic adduct by the method claimed in any one of the preceding claims and subsequent to the electrolysis, the conversion of the adduct formed by the electrolysis into an adduct containing a less volatile solvent radical by a radical exchange reaction.
Claim 10
Independent Claim
38 words
A method according to any one of the preceding claims 1 to 7 and which comprises, subsequent to the electrolysis, the conversion of the adduct formed by the electrolysis into the radical-free organometallic compound M(R') 3 by distillation.
Claim 11
Dependent Claim
25 words
A method according to claim 9 characterised in that M(R') 3 is trimethyl indium and the distillation follows the addition of benzene to the adduct.
Claim 12
Dependent Claim
31 words
A method according to claim 9 characterised in that M(R') 3 is trimethylgallium and the distillation is at a temperature above the adduct dissociation temperature, the trimethylgallium being collected by fractionation.
References Cited (Backward Citations)
No citation records indexed.
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