New efficient route for preparation of organosilicon linear and cyclic oligomers containing C=C bond and silicon-atom in the chain, based on the catalytic polymerization of divinylsubstituted organosilicon compounds (i.e. divinyl-silanes, -siloxanes and -silazanes), is overviewed. The oligocondensation yields linear silylene (siloxylene, silazanylene)-vinylene oligomers or cyclic dimers (trimers) when using ruthenium and rhodium complexes. respectively. In the presence of Ru and Rh complexes diallyldiorganosilane and allylvinyldimethylsilane undergo prior isomerization followed by oligococondensation yielding respective silylene-propylene and silylene-propylene-vinylene oligomers.