Certain tetrasubstituted hydrocarbon silanes were chlorinated and brominated to form a- halo derivatives which were converted to silyl acetates with potassium acetate and to displacement and cleavage products with potassium cyanide and sodium amide. The Grignard reagents of a-halosilanes were condensed with acetic anhydride to form the silyl ketone, with allyl bromide to form the silyl oleh, and with acetone and benzaldehyde to ...