The polymerization of trimethylsilylacetylene was investigated by using W and Mo catalysts. Mixtures of WCl 6 with appropriate organometallic cocatalysts such as n ‐Bu 4 Sn and Et 3 SiH at 1:1 molar ratio provided poly(trimethylsilylacetylene) in high yields. On the other hand, MoCI 5 gave mainly methanol‐soluble oligomers even in the presence of these cocatalysts. The polymer formed was a partly insoluble yellow powder, and the molecular weight of the soluble fraction was about 7000. The IR, 1 H‐NMR, and 13 C‐NMR spectra supported the polymer structure, (CH = CSiMe 3 ) n . Protodesilylation of poly(trimethylsilylacetylene) afforded a new polymer containing both acetylene and trimethylsilylacetylene units.
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Okano et al. (1984) studied this question.
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