Mononuclear And Heterobimetallic Complexes Of Palladium(Ii) With 4,5-Diphenyl-1,2,4-Triazole-3-Thione

The reaction of Na2PdCl4 with 4,5-diphenyl- 1,2,4-triazole3-thione (LH) in acetone gave cis-[PdCl2(LH)(2)], Stirring cis-[PdCl2(LH)(2)] in methanol gave a diamagnetic cis-[PdL2]. Reaction of cis-[PdL2] with diphosphines gave diamagnetic complexes of the type [PdL2(diphos)] where diphos = 1,2bis(diphenylphosphino)-methane (dppm), 1,2-bis(diphenylphosphino)ethane (dppe) or 1,2-bis(diphenylphosphino)propane (dppp). The complexes cis-[PdCl2(LH)(2)] and cis-[PdL2(diphos)] have been used effectively to prepare bimetallic complexes of the type CiS-[Cl2Pd(mu-LH)(2)M'Cl-2] where M'= Co, Ni, Mn or SnCl2 and [(diphos)Pd(mu-L)(2)M' Cl-2] where M' = Co or Ni, the prepared complexes were characterized by elemental analysis, magnetic susceptibility, IR, UV-Vis, H-1 and P-31-{H-1} NMR spectral data.