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Synthesis, Characterisation and Antimicrobial Activities of 1, 2 Naphthoquinone-1-Oxime Ligand and its Metal Chelates of Hg (II), Pb (II), Ag (I), Zn (II) and Cd (II)

N. R. Gonewar, V. B. Jadhav, A. A. Killedar, S. S. Sakure, K. D. Jadhav and R. G. Sarawadekar

Five metal chelates of the type M [NQO]2 where M = Hg, Cd, Ag, Zn, Pb, NQO = 1, 2 napthoquinone-1-oxime and Ag(NQO) have been synthesized. All chelates have been characterized by modern methods such as elemental analysis, FTIR, Electronic spectra. 1H & 13C NMR, Thermogravimetry and Differential scanning calorimetry and electron microscopy with EDAX analysis. All chelates are found to be coloured and mercury, lead, zinc and cadmium chelates are octahedral while silver chelate has been assigned square planer. These chelates are thermally stable up to 700oC and all are crystalline in nature. Their particle sizes are in the range of 30-50 nm. The ligand and the metal chelates have been screened for antimicrobial activity on gram positive and gram negative bacteria and fungi.