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A mechanistic study of the hydroselenation of alkynes catalyzed by Pd(PPh 3 ) 4 and Pt(PPh 3 ) 4 has shown that the palladium complex gives products of both Se H and Se Se bond addition to the triple bond of alkynes, while the platinum complex selectively catalyzes Se H bond addition. The key intermediate of PhSeH addition to the metal center, namely Pt(H)(SePh)(PPh...
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