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

Resumo

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 [Cu₂(HNPv)₂(H₂O)2(μ-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.