Reactions of a series of 1,2-bis(methylchlorosilyl)ethylenes and -acetylenes Me(n)Cl(3-n)SiZ-SiCl3-nMen (Z = CH=CH, Cequivalent toC; n=0-2) with ethanol and acetoxime were studied. Novel alkoxy- and isopropylideneaminooxysilanes were obtained and characterized. A relation was found between the activity of Si-Cl bonds in the reactions studied and the structure of the carbon-carbon bridge.