ORGANOMETALLIC COMPOUNDS OF TRANSITION-METALS CONTAINING PHOSPHINE AND PERCHLORARYL LIGANDS .6. MONO(PENTACHLOROPHENYL) AND BIS(PENTACHLOROPHENYL) COMPLEXES OF NICKEL AND PALLADIUM

New organometallic compounds of nickel(II) and palladium(II) containing C6Cl5 and bipy ligands are described, viz.: [NiX(C6Cl5)bipy] (X = NCS, NO2, [PdX(C6Cl5)bipy] (X = Cl, Br), and [M(C6Cl5)bipy] ClO4 (M = Ni, Pd; L= PPh3, py). The replacement of nitrogen-containing ligand by the phosphines PEt3, PPh3 and dpe in the new compounds and in the previously reported [NiCl(C6Cl5)bipy] and [Pd(C6Cl5)2bipy] has been studied. Substitution occurs with PEt3 or dpe in the neutral compounds (but not in the cationic compounds) and in this way the new compounds [PdX(C6Cl5)dpe] (X = Cl, Br), cis-[Pd(C6Cl5)2(PEt3)2] and [Pd(C6Cl5)2dpe] have been obtained. The action of gaseous HCl on cis-[Pd(C6Cl5)2(PEt3)2] leads to the new compounds cis-[PdCl(C6Cl5)(PEt3)2], and also cleaves the PdC6Cl5 bonds of [Pd(C6Cl52dpe], the first phosphine-containing pentachlorophenyl complex of Ni, Pd, or Pt which decomposes under these conditions. © 1979.