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

Binuclear copper(I) complexes [Cu(dppm)(NO3)](2) (1), dppm = Ph2PCH2PPh2, [Cu(dppm)(2,9-Me(2)Phen)](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., P-31-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 Cu atoms, and that NO3 behaves as a monodentate ligand or free ion in the newly prepared complexes.