Abstract
A new series of the polydentate Schiff base CuII, CoII, NiII, PdII and ZnII complexes derived from ethylenediamine (eda), diethylenetriamine (dea) and tris(2-aminoethyl)amine (taa) have been prepared by template condensation in MeOH solution, and characterized by i.r., electronic spectral data, elemental analyses, conductivity and magnetic measurements. The 1H- and 13C-n.m.r. and mass spectral data of the NiII, PdII and ZnII complexes have been recorded. In all complexes, some of the chloride ions coordinate to the metal ions. From conductivity measurements, it is shown that the complexes are electrolytes. The NiII, PdII and ZnII complexes have diamagnetic character. In this study, the Schiff base CuII and CoII complexes have sub-normal magnetic moments commensurate with their binuclear or tetranuclear nature. Some show antimicrobial activity against bacteria and yeast.
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