New method for the synthesis of cage and polymeric metallosiloxanes

Cage organometallosiloxanes were synthesized according to a new procedure u sing monomeric organoalkoxysilanes as the starting compounds. The latter we re subjected to hydrolysis immediately before the exchange reaction of sodi um silanolate with metal halides. Difficultly accessible metallovinylsiloxa nes, metallomethylsiloxanes, and metallosiloxanes containing a functional g roup in the organic radical at the silicon atom can be readily prepared acc ording to the method proposed.