Synthesis and Characterization of Some Transition Metal Complexes with New Thiazolylazo Ligand

Abstract

The preparation structural identification of some transition metal complexes of
new thiazolylazo ligand 2-[ (2-Thiazolyl) azo ]-4-benzyl phenol (TABP = HL) are
studied on the basis of their analytical, spectroscopic, magnetic susceptibility and
conductance data. The stability constant of prepared complexes have been determined
by spectrophotometric method. The stability of complexes follows the sequence;
Cu(II) > Co(III) > Ni(II) > Hg(II) > Cd(II) > Zn(II) > Ag(I). The isolated solid
complexes are found to have the general formula [ ML2 ].x H2O (M = Ni(II), Cu(II),
(x = 1), M = Zn(II), Cd(II), Hg(II), (x = 2) or [ CoL2 ]Cl.H2O and [ AgL(H2O) ]. H2O.
Structural information has been taken from spectroscopic, magnetic and molar
conductance measurements. The coordination number of all metal ions is found to be
six, except of Ag(I) complex was found four, with binding through the phenolate O,
azo N and with thiazole N atom.