تحضير وتشخيص ليكاند حلقة كبيرة من نوع N2S2 ومعقداته الفلزية ثنائية النواة مع دراسة بعض الخصائص الفيزياوية للمركبات المحضرة

Abstract

The macrocycle ligand type N2S2 have been prepared through two steps.the first Included the reaction between two equivalent of mercapto acetic acid and one eq- Univalent of hydrazine hydrate , the second included the reaction of first step pre- Cursor with penta erythritol tetra bromide,to obtainted the target ligand .the Co+2 ,with metal from there action of the ligandComplexes were prepared Ni+2 , Cu+2ions 1:2 ratio , the prepousd compounds were characterized by FT-IR , UV-Vis , NMR , C.H.N spectoscopies as well as the molar conductivity and magnetic successptibility, stability constant and mole ratio was corried out of prepared complexes these measurements shows the suggested geometry around the metal ions are distorted octahedral The effect of temperature on the stability constants were found to raising the Temperature .the thermodynamic function (ΔG, ΔH , ΔS) of the formed complexes were calculated at range of temperature that showed complexes reaction was undo thermic and spontaneous . formation