SYNTHESIS AND THERMAL-DECOMPOSITION OF COBALT-CONTAINING OLIGOSILANES

Oligo(phenylcobaltcarbonylsilane) was prepared from oligo(phenylsilane ) and dicobalt octacarbonyl. The reaction proceeds with elimination of H-2 and CO and insertion of cobalt carbonyl fragments into the silico ne backbone of oligosilane. Oligosilane containing cobalt carbonyl gro ups in side organic substituents was obtained from oligo{methyl(phenyl ethynyl)}silane and Co-2(CO)(8). The reaction of 1,2-bis(phenylethynyl )tetramethyldisilane with Co-2(CO)(8) proceeds with the sequential att achment of cobalt carbonyl fragments to ethynyl groups to form disilan e derivatives [eta(2)-C=CPhCo(2)(CO)(6)]. Thermal decomposition of cob alt-containing oligosilanes affords a mixture of paramagnets and ferro magnets.