Synthesis,structure and characterization of binuclear copper(I) complexes

Binuclear copper(I) complexes Cu(dppm)(NO3)]2 (1), dppm=Ph2PCH2PPh2, Cu(dppm)(2,9-Me2Phen)]2(NO3)2 (2), Cu(dppm)(I)]2 (3) and Cu(dppm)(py)]2(NO3)2 (4), (py=pyridine) have been synthesized by ligand reduction of cupric nitrate with dppm in EtOH and characterized by elemental analyses, molecular weight determination, t.g.a., 31P-n.m.r spectra; their electronic conductivities and c.v. waves have also been measured. The results show that dppm coordinates as a bridging bidentate ligand to the CuI atoms, and that NO3 behaves as a monodentate ligand or free ion in the newly prepared complexes.