A Study of Cu(II) Complexes with Pyruvic Acid Nicotinoyl and Isonicotinoyl Hydrazones by EPR and X-ray Absorption Spectroscopy

The composition and structure of the Cu2+ coordination cores in the previously synthesized [CuCl(HNPv)] H2O, [CuCl(HIPv)] H2O, [Cu(AOc)(HNPv)], [Cu(AOc)(HIPv)], [Cu(NO3)(HNPv)], and [Cu(NO3)(HIPv)] complexes, where HNPv and HIPv pyruvic acid nicotinoyl and isonicotinoyl hydrazones, respectively, have been determined. The binuclear complex [Cu-2(HNPv)(2)(H2O)2(-Cl)] has been synthesized for the first time and characterized by elemental analysis and IR, EPR, and EXAFS spectroscopy. Its dimeric structure has been proved by magnetic susceptibility measurement and EPR.