Abstract

The polymerization of methylsilane by catalytic dehydrocoupling with dimethyltitanocene and dimethylzirconocene catalysts is described. The reaction proceeds at reasonable rates at monmer pressures of 10 at. or more, giving quantitative conversion to a glassy solid. The polymer produced under carefully controlled conditions is completely soluble in most organic solvents, but cross linking occurs if the reaction is run for too long after the complete consumption of the monomer, or if the solid polymer is left in contact with the catalyst. The polymethylsilane contains considerably more high molecular weight material (25% with MW > 10, 000 dalton) than is characteristic of other polyorganosilanes produced by this type of dehydrocoupling.

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