Synthesis,characterization and liquid-liquid extraction properties of new methoxyaminobiphenylglyoxime derivatives and their complexes with some transition metals

摘要

In this study,three new aminobiphenylglyoximes,[L~1H_2] N-(2-methoxy)aminobiphenylglyoxime,[L~2H_2] N-(3-methoxy)aminobiphenylglyoxime and L[~3H_2] N-(4-methoxy)aminobiphenylglyoxime have been synthesized by the reaction of(E,E)-4'-biphenylchloroglyoxime with 2-Methoxyaniline,3-Methoxyaniline and 4-Methoxyaniline in absolute ethanol.The preparation Ni~(II),Co~(II)and Cu~(II)complexes of these ligands are described.The ligands and their complexes were characterized by elemental analyses,IR,mass,H~1 and ~(13)C NMR spectra,thermogravimetric analyses(t.g.a)and magnetic susceptibility measurements.Ligands complexing properties were studied by the liquid-liquid extraction of selected alkali(Li~+,Na~+,K~+,Cs~+)and transition metals(Co~(2+),Ni~(2+),Cu~(2+),Zn~(2+),Cd~(2+),Pb~(2+)).It has been observed that all ligands show a high affinity to Cu~(2+)ions,whereas almost no affinity to alkali metals.The extraction equilibrium constants(K_(ex))for complexes of ligands with Cu~(2+)metal picrates between dichloromethane and water have been determined at 25°C.