[Spectral analysis of Cu(I), Zn(II) complexes of Schiff base and their dismutation to O2- free radical].

In the present paper a new 5-nitrosalicylaldehyde was prepared by the reaction of salicylaldehyde with mix acid, and this semicarbazide Schiff base ligand and its complex containing Cu (II) and Ni (III) were synthesized. Its compositions and structure were characterized by elemental analyses, thermal analyses,IR spectra and UV spectra, 1H NMR and molar conductivity. The dismutation to O2- free radical was also investigated. The result shows that the structure and thermodynamic properties were stable. The complexes showed a distinct O2- scavenging effect and some protective effects on hemoglobin of human erythrocyte in the system of O2- generating riboflavin with irradiation.

A dinuclear copper complex: bis-(µ-4-amino-benzoato)bis-[aqua(1,10-phenanthroline)copper(II)] dichloride bis(4-amino-benzoic acid) dihydrate.

The title complex, [Cu(2)(C(7)H(6)NO(2))(2)(C(12)H(8)N(2))(2)(H(2)O)(2)]·2C(7)H(7)NO(2)·2H(2)O, consists of a dinuclear [Cu(2)(C(7)H(6)NO(2))(2)(C(12)H(8)N(2))(2)(H(2)O)(2)](2+) cation, two Cl(-) anions, two 4-amino-benzoic acid mol-ecules and two disordered water mol-ecules (site occupancy factors 0.5). The Cu(II) ion adopts a distorted square-pyramidal geometry formed by two N atoms from the 1,10-phenanthroline ligand and two O atoms of the two 4-amino-benzoic acid ligands and one water O atom. The Cu⋯Cu separation is 3.109 (2) Å. A twofold axis passes through the mid-point of the Cu⋯Cu vector.