SYNTHESIS, CHARACTERIZATION, AND BIOLOGICAL STUDIES ON COBALT (II), NICKEL(II), COPPER(II), AND ZINC(II) COMPLEXES WITH N-PICOL INOYL-N′-THIOBENZOYL HYDRAZINE

ABSTRACT

Complexes of Co(II), Ni(II), Cu(II) and Zn(II) with N-picolinoyl-N′-thiobenzoyl hydrazine (H₂L) have been prepared and characterized. Based on elemental analyses, infrared, magnetic, electronic, ESR and FAB mass spectra, square-planar structures for [Cu(L)] and [Ni(HL)Cl], an octahedral structure for [Co(L)(H₂O)₂] and a mixed octahedral–square-planar structure for [Ni(L)(H₂O)] have been proposed. H₂L and its soluble complexes have been screened against several bacteria and fungi.

ACKNOWLEDGEMENTS

We thank Dr. V. B. Chauhan, Plant Pathology Division, Institute of Agricultural Sciences, Banaras Hindu University, and Dr. Gopal Nath, Microbiology Division, Institute of Medical Sciences, Banaras Hindu University, for antimicrobial screening.