TRIAZENIDO-BRIDGED BINUCLEAR PALLADIUM(II) AND PLATINUM(II) COMPLEXES

Triazenido-bridged binuclear palladium(II) and platinum(II) complexes of the type [M(2)X(2)(mu-ArNNNAr)(2)(PR(3))(2)] (where M = Pd or Pt; X = Cl, Me, p-tol; Ar = Ph, p-tol or p-C6H4F; PR(3) = PEt(3), PBu(3), PMe(2)Ph or PMePh(2)) have been prepared by the reaction of [M(2)X(2)(mu-Cl)(2)(PR(3))(2)] with free triazene in the presence of NaOH. These complexes were characterised by elemental analyses, IR and NMR (H-1, P-31, Pt-195) spectrpscopy. Variable temperature NMR data reveal that the eight-membered metallocyclic ring has a rigid conformation. Pt-195 NMR data showed the existence of significant metal-metal interaction. A few reactions of these complexes have also been investigated by NMR spectroscopy.