Bimetallic Systems. Part 5. Isonitrile-Platinum(II)- or -Palladium(II)- Bis(diphenylphosphino)methane Complexes including Heterobimetallics with Silver(I), Gold(I), or Rhodium(I)

Article abstract of DOI:10.1039/DT9840001233

Treatment of cis- with Bu^tNC gives <(Bu^tNC)2Pt(μ-dppm)2Pt(CNBu^t)2>(4+), isolated as the PF6(1-) salt (dppm = Ph2PCH2PPh2).Treatment of Cl2 (M = Pt or Pd) with two equivalents of Bu^tNC or MeNC gave fluxional, mononuclear isonitrile complexes of type (2+), isolated as their PF6(1-) or BPh4(1-) salts.The palladium salts readily lose the CNR ligands.The unidentate-dppm complexes of type (2+) react with AgPF6, HgCl2, or to give heterobimetallic complexes with μ-dppm ligands, but these were not isolated in a pure state.However, the salts Cl2 (M = Pt or Pd) react with the compounds (R = Me, Bu^t, or p-tolyl) to give the heterobimetallic complexes <(RNC)ClM(μ-dppm)2AgCl>(1+) in high yield.These were isolated as Cl(1-), BPh4(1-), or PF6(1-) salts.The salt t)2(dppm-P)2>Cl2, prepared in situ from Cl2 and Bu^tNC, reacts with <4> or to give <(Bu^tNC)ClPt(μ-dppm)2MCl>Cl (M = Ag or Au).Treatment of Cl2 with CPh)(CNBu^t)> gives <(Bu^tNC)(PhC<*>C)Pt(μ-dppm)2AuCl>Cl.Treatment of <(Bu^tNC)ClPt(μ-dppm)2AgCl>Cl with gives the complex <(Bu^tNC)ClPt(μ-dppm)2RhCl(CO)> and silver chloride in a transmetallation reaction.I.r. and 1H-<31P>, 31P-<1H>, and 195Pt-<1H> n.m.r. data are given and discussed.

Full text of DOI:10.1039/DT9840001233

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