A series of new binuclear Pd (II) complexes based on chelating diimines and bridging diphosphine or diimine ligands have been synthesized and characterized successfully. The formula of the new complexes are [Pd2 (mbyp) 2 (DPA) 2](PF6) 4 (1),[Pd2 (mbyp) 2 (DPE) 2](PF6) 4 (2),[Pd2 (mbyp) 2 (4, 4-byp) 2](PF6) 4 (3),[Pd2 (mbyp) 2 (t-pye) 2](PF6) 4 (4)[mbyp= 4, 4′-dimethyl-2, 2′-bipyridine, DPA= 1, 2-bis (diphenylphosphino) acetylene ...