MONONUCLEAR AND POLYNUCLEAR COMPLEXES OF PALLADIUM(II) AND PLATINUM(II) WITH HC(PPH2)3

Complexes of the type [MXX'{eta2-(PPh2)3CH}] (M = Pd, X = X' = Cl (1), Br (3), C6F5 (6); X = Cl, X' = C6F5 (4); M = Pt X = X' = Cl (2), C6F5 (7); X = Cl, X' = C6F5 (5)) have been obtained by reaction of palladi um or platinum compounds with HC(PPh2)3. The P-31(H-1) NMR spectra of these complexes indicate that one of the P atoms of the triphosphine r emains uncoordinated and allows the synthesis of polynuclear complexes such as [(C6F5)2M{eta3-mu2-(PPh2)3CH)Pt(C6F5)2(CO)] (M = Pd (9), Pt ( 10)) and [{(C6F5)2M(eta3-mu2-(PPh2)3CH)}2Au] (ClO4) (M = Pd (11), Pt ( 12)). The structure of these complexes has been established using P-31 {H-1) and F-19 NMR spectra.