Abstract
Treatment of Tp′Rh(PMe 3)Cl 2 and Tp′Rh(CNCH 2CMe 3)Cl 2 with Cp 2ZrH 2 produces Tp′Rh(PMe 3)H 2 and Tp′Rh(CNCH 2CMe 3)H 2, respectively, in excellent yield. Photolysis of benzene solutions of each dihydride complex generates hydrogen and the fragment [Tp′Rh(L)] which inserts into the solvent C–H bond. The phosphine dihydride has also been shown to be a catalyst for the hydrogenation of biphenylene, showing a capability to cleave C–C bonds. Reductive elimination of benzene from Tp′Rh(PMe 3)PhH is nearly 250 times slower than from Cp*Rh(PMe 3)PhH.
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