The hafnium hydrostannyl complex CpCpHf(SnHMes(2))Cl (Cp = eta(5)-C(5)Me(5)) has been synthesized from the reaction of CpCpHf(H)Cl with Mes(2)SnH(2). This compound has been identified as an intermediate in the metal-catalyzed dehydrocoupling of Mes(2)SnH(2) to the distannane Mes(2)HSnSnHMes(2) (Mes = 2,4,6-trimethylphenyl). The dehydrocoupling in this system appears to occur by elimination of :SnMes(2) from CpCpHf(SnHMes(2))Cl, with Sn-Sn bond formation proceeding via insertion of the stannylene into a Sn-H bond.
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Neale et al. (2002) studied this question.
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