REACTIONS OF AMIDES WITH ZEROVALENT AND DIVALENT PALLADIUM AND PLATINUM COMPLEXES

The reactions of amides (RCONH2 and CF3SO2NH2) with L2Pd(CH3)2 and L2Pt(CH3)2 and with transient L2Pt0 to yield new complexes containing palladium- and platinum-amido nitrogen bonds are reported. Photolysis of Pt(C2O4)(PEt3)2 (1) in the presence of amide generates products of the type trans-PtH-(HNR)(PEt3)2 (R = SO2CF3 (1a), COCF3 (1b)). Reaction of amides with trans-PtH-(CH3)(PEt3)2 (2), cis-PdMe2(PEt3)2 (3), cis-PtMe2(PEt3)2 (4), PdMe2(dcpe) (5), PdMe2(dmpe) (6), and PtMe2(COD) (7) produces 1a,b, trans-PdMe(HNR)(PEt3)2 (R = SO2CF3 (3a), COCF3 (3b), COCF2H (3c), COPh (3d)), PtMe(HNR)(PEt3)2 (R = SO2CF3 (4a), COCF3 (4b)), PdMe(HNR)(dcpe) (R = SO2CF3 (5a), COCF3 (5b), COPh (5c)), PdMe(HNSO2CF3)(dmpe) (6a), and PtMe(HNR)(COD) (R = SO2CF3 (7a), COCF3 (7b)), respectively. The stereochemistry and topologies of the new compounds are established by multinuclear NMR spectroscopy. The relevance of these reactions to hydroamination catalysis is discussed.