Abstract
Dehydrogenative polymerization of pentamethyldisilane by means of CP 2MMe 2 (M Ti, Zr) afforded a mixture of the oligosilanes Me 3Si[Me 2Si] 2 SiMe 2H; 1,1,2,2-tetramethyldisilane reacts to a mixture of the oligosilanes Me 2HSi[ Me 2Si] n SiHMe 2. Dehydrogenative polymerization of 1,2-dimethyldisilane by use of Cp 2MR 2 (M Ti, Zr; R Me, nBu) afforded the new unique cross linked polysilane polymer poly(methylsilane) (MeSiH x ) n . The pyrolysis of (MeSiH x ) n at 1500°C (argon) gives a ceramic yield (SiC) of 88%. The polymerization progress is observed and investigated by GLC, GC-MS and 29Si-NMR spectroscopy, and the oligomers, formed at the beginning of the polymerization, are identified.
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