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Photolysis of phenylpentamethyldisilanylacetylene in the presence of [PdCl2(PEt3)2] afforded 1,1,4,4-tetramethyl-2,5-bis(trimethylsilyl)-3,6-diphenyl-1,4-disilacyclohexa-2,5-diene via dimerization of an initially formed 1-silacyclopropene.
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Ishikawa et al. (1977) studied this question.
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