PREPARATION AND PROPERTIES OF CYCLIC 6-MEMBERED SILICON COMPOUNDS

The reaction of 1,1-dichlorosilacyclohexane and 1,1-dimethylsilacyclohexane with sulfuryl chloride was studied. The chlorination of 1,1-dichlorosilacyclohexane caused little opening of the ring which was extensive during the chlorination of 1,1-dimethylsilacyclohexane. The distributions of isomers obtained from these cyclic silanes were compared with those obtained by chlorination of n-alkylchlorosilanes. Chlorine atoms on silicon disfavor free-radical chlorination on carbon atoms directly attached to such a silicon both in linear and cyclic silanes. Dehydrohalogenation was carried out on the monochlorinated 1,1-dichlorosilacyclohexanes with quinoline, ferric chloride, and pyrolysis. © 1968, American Chemical Society. All rights reserved.