摘要：New Azo Schiff bases was synthesized by reaction 3-formyl-4-hydroxy phenylazo benzene with Pyridine-2,6-Dicarbohydrazide has been characterized by elemental analyses and IR, mass, 1HNMR, and 13CNMR spectral data. Azo Schiff base has been studied by liquid-liquid extraction towards the metal ion Cu2+ from aqueous phase to organic phase. behave as good extractant ligand for Cupper ion Cu2+ from aqueous solution, and the study of condition of extraction shows that the optimum pH values for extraction was (pH=7 ),in addition the optimum shaking time to reach the equilibria was (60 min.), as well as the stoichiometric study by using Slope Analysis Method shows the structure of Cu2+ ion complex with ligand was 1 : 1 (metal : ligand), in addition the study of organic solvent effect appear there is no straight line relation between the distribution ratio for extraction of Cu2+ ion and dielectric constant for organic solvents but this study demonstrate there is an effect for the structure of organic solvent used, thermodynamic study shows the complexation reaction an endothermic
