Synthesis,characterization, electrical and biological studies on some bivalent metal complexes

Metal complexes of manganese(II), iron(II), cobalt(II), nickel(II), copper(II), zinc(II), and cadmium(II) with Schiff base derived from 2,5-dihydroxyacetophenone and s-benzyldithiocarbazate have been synthesized and characterized by elemental analysis, thermogravimetric analysis, molar conductance, molecular weight, magnetic susceptibility measurements, and electronic and infrared spectra. The molar conductivity data show them to be nonelectrolytes. The Schiff base behaves as a tridentate dibasic ONS donor towards metal ions. Thermal analyses indicate the presence of water in the complexes, making them six and four coordinates. The solid state electrical conductivity of the ligand and its complexes has been measured in the temperature range 313–414 K and the complexes are found to show semiconducting behavior. The antibacterial activities of the ligand and its complexes have also been screened against various organisms and it is observed that the coordination of metal ions has a pronounced effect on the bacterial activity of the ligand.