Synthetic and biocidal studies on the complexes of 1-artl-2,5-dithiohydrazodicarbonamide with co(ii), cu(ii) and zn(ii)

Abstract

1-Aryl-2,5-dithiohydrazodicarbonamide (aryl=ethoxyphenyl-(I) and chlorophenyl-(II)) forms 1:1 complexes of the type M(epthc) wherein M=Co(II), Ni(II), Cu(II) and Zn(II) and epthc=p-ethoxyphenyl dithiohydrazodicarbonamide; M(cpthc) M=Co(II), Cu(II) and Zn(II) and M(cpthc).2H20 (M=Ni(II)) and cpthc=p-chlorophenyldithiohydrazodicarbonamide. Magnetic and electronic spectral studies suggest tetrahedral geometry for Co(epthc) and Co(epthc) while a square-planar geometry is indicated for Ni(epthc), Cu(epthc) and Cu(cpthc); Ni(cpthc). 2H20 is shown to possess an octahedral geometry. Infrared spectra ascertain a binegative tetradentate behaviour of the ligands and the bonding sites are both hydrazidic nitrogens and the thiolo-sulphur. The Co(II), Ni(II) and Cu(II) complexes and ligands (I,II). © 1992, Taylor & Francis Group, LLC. All rights reserved.