S4 mono nuclear and thier complexes with some metal ions , synthesis and physical studies.

Abstract

The tetradentate (S4) ligand have been synthesized through the refluxed of 2-amino-1,3,4- thiadiazole -5- thiol with dibromoethane in presence anhydrous sodium carbonate. The metal complexes of this ligand was curried out by the direct reaction of metal salts with ligand .The prepared complexes and ligand were characterized by FT - IR ,UV-Vis ,NMR , Mass Spectroscopies and C.H.N.S elementary analysis. In addition to the motor conductivity and magnetic successpitibilty. Stability constant and mole ratio was carried out of prepared complexes. The thermodynamic parameters ΔH , ΔG , ΔS were measured. The spectroscopic studies and magnetic moments measurements showed the octahedral geometry around the Co, Cu and tetrahedrul geometry around Nickel ion.