Synthesis and Spectroscopic Study of Transition Elements Complexes with New –β-diketonate Hetero-Ligand

Abstract

A new ligand 3-[benzothiazolyl]-2,4-pentadione (HL) has been prepared by sequence reactions of 2-mercaptobenzothiazole (I) by methylation and oxidation reactions, then substitution of derivative (III) using sodium hydride as strong base. The product was isolated, studied and fully characterized by appropriate physical measurements; F.T.I.R., UV/Visible, and determination of molecular weight by the depression in freezing point (DT_F) in nitrobenzene as solvent. The new ligand (HL) has been used to prepare a series of complexes with Cr(III), Mn(II), Co(II), Ni(II) & Cu(II).

All the prepared complexes have been studied and characterized in solid state by micro elemental anaylsis (C.H.N.M), F.T.I.R. UV/Visible,  magnetic moment (μ_eff), and measurement of molar conductance (Λ_m) in D.M.F. Molar ratio measurements in solution gave comparable results with those obtained from solid state study.