Hydrosilylation of 1,4-bis(trimethylsily)-1,3-butadiyne with platinum and rhodium catalyst proceeded stepwise to give first 2-silyl-1,4-bis(trimethylsilyl)-1-buten-3-ynes and then 1,3-disilyl-1,4-bis(trimethylsilyl)-1,2-butadienes in high yields.
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Kusumoto et al. (1985) studied this question.
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