Addition Compounds of Silicon Tetrachloride

Abstract

SILICON tetrachloride forms 1 : 4, 1 : 2 and 1 : 1 addition compounds with amines. Only one monoaminate has been identified (silicon tetrachloride: dimethylaniline); but the tetraminates and the diaminates are general occurrences when amines (butylamine, diethylamine, triethylamine, tributylamine, piperidine, pyridine, dimethylaniline, aniline) are mixed with silicon tetrachloride. The addition compounds appear immediately as fine-grained insoluble precipitates; when dried, they are powders. They can be prepared independently of one another by controlling the concentrations of the reactants. The white tetraminates are chemically less reactive and thermally more stable than the coloured diaminates. The tetraminates begin to decompose at temperatures above and below 100° C. A complete report is being published in the Canadian Journal of Chemistry.