Process of preparing disilane by reduction of hexachlorodisilane

Details Process of preparing disilane by reduction of hexachlorodisilane Process of preparing disilane by reduction of hexachlorodisilane

1985-02-19

1987-01-27

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

423344, C01B 3304

Patent

active

046393617

ABSTRACT:
Disilane Si.sub.2 H.sub.6 is obtained with good yield by reduction reaction of Si.sub.2 Cl.sub.6 with a mixture of LiH and LiAlH.sub.4 in an organic liquid medium such as n-butyl ether. Usually the reaction temperature is -25.degree. C. to 50.degree. C. A suitable range of the mole ratio of LiH to LiAlH.sub.4 is from 0.8 to 40. It is impracticable to reduce Si.sub.2 Cl.sub.6 to Si.sub.2 H.sub.6 by using LiH alone as the reducing agent, but the reaction proceeds smoothly when a LiH/LiAlH.sub.4 mixture is used. The use of the mixture is economically advantageous over the use of expensive LiAlH.sub.4 alone.

REFERENCES:
patent: 4374111 (1983-02-01), Lefrancois
patent: 4407783 (1983-10-01), Ulmer et al.
"The Preparation and Some Properties of Hydrides of Elements of the Fourth Group of the Periodic System and of their Organic Derivatives", Finholt et al, J. AM. Chem. Soc., 69, 2692 (1947).

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