Synthesis and Characterization of the Complexes of Some Transition Metals with 4-[2’-hydroxy salicylidene -5’ (2”-thiazolyazo] Chlorobenzene

Abstract

Complexes of Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) with 4-[2'-hydroxy salicylidene 5' (2"-thiozlylazo] chlorobenzene have been synthesized and characterized by elemental analysis, molar conductance, magnetic susceptibility, spectral studies, IR. electronic, ESR and X-ray diffraction studies. All complexes exhibit the composition M2 L2 X2, where M = Co (II), Ni (II), Cu (II), Zn (II) and Cd (II), L = 4-[2'-hydroxy salicylidene 5' (2"4thiazolylazo] chlorobenzene and X=C1. The metal coordinate with Schiff base nitrogen atom azo nitrogen, atom and phenolic hydroxyl oxygen atom of the ligand. The ONN donor ligand acts as a tridentate ligand in all complexes. The spectral analysis indicate tetrahedral geometry for Co(II), Ni(II), Zn(II) and Cd(II) complexes while distorted tetrahedral geometry for the Cu (II) complex. The X-ray powder diffraction of some complexes were studied and suggest tetragonal crystal system. The ligand and complexes have been screened for their antimicrobial activity against some bacterial and fungal activity.