Bioactive Heterometallic Cu-Zn Complexes with Potential Biomedical Applications.

A series of multinuclear heterometallic Cu-Zn complexes of molecular formula [(CuL)Zn(dca)] (), [(CuL)Zn(NO)] (), [(CuL)Zn(Cl)] (), and [(CuL)Zn(NO)] () have been synthesized by reacting [CuL] as a "metalloligand (ML)" (where HL = ,'-bis(5-chloro-2-hydroxybenzylidene)-2,2-dimethylpropane-1,3-diamine) and by varying the anions or coligands using the same molar ratios of the reactants. All of the four products including the ML have been characterized by infrared and UV-vis spectroscopies and elemental and single-crystal X-ray diffraction analyses. By varying the anions, different structures and topologies are obtained which we have tried to rationalize by means of thorough density functional theory calculations.