Synthesis, spectral studies of cobalt(II) tetrathiocyanoto dicuperate(I) complexes with some acylhydrazones and their antimicrobial activity
作者:V. P. Singh、A. Singh
DOI:10.1134/s1070328408050102
日期:2008.5
Cobalt(II) complexes of the type Co[Cu(NCS)(2)](2) center dot L, where L is acetophenonebenzoylhydrazone (Abh), acetophenoneisonicotinoylhydrazone (Ainh), acetophenonesalicyloylhydrazone (Ash), acetophenoneanthraniloylhydrazone (Aah), p-hydroxyacetophenonebenzoylhydrazone (Phabh), p-hydroxyacetophenoneisonicotinoylhydrazone (Phainh), p-hydroxyacetophenonesalicyloylhydrazone (Phash), and p-hydroxyacetophenoneanthraniloylhydrazone (Phaah) were synthesized and characterized by elemental analyses, molar conductance, magnetic moments, electronic and IR spectra, and X-ray diffraction studies. The complexes are insoluble in common organic solvents and are non-electrolytes. These complexes are coordinated through the >C=O and >C=N groups of the hydrazone ligands. The magnetic moments and electronic spectra suggest a spin-free octahedral geometry around Co(II). The X-ray diffraction parameters (a, b, c) for Co[Cu(SCN)(2)](2) Ainh and Co[Cu(SCN)(2)](2) . Phabh correspond to orthorhombic and tetragonal crystal lattices, respectively. The complexes show a fair antifungal and antibacterial activity against a number of fungi and bacteria. The activity increases with increasing concentration of the compounds.