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Needlelike crystals of a phenylsilicon compound synthesized on crystallization during polymerization in a transport reaction in a temperature gradient, which were thought earlier to be polymeric diphenylsilylene, are shown to be actually tetraphenylsilane. Similarly produced crystals of the germanium analog led, in contrast, to polydiphenylgermylene. An overall reaction scheme uniting both reactions is suggested.
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Shu et al. (1980) studied this question.
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