Preparation, Charecterazation of new nitro-chalcone azo ligands and their divalent ionic complexes

Abstract

In this study two of nitro-chalcone azo ligands were synthesized via the reaction of the diazonium salt of amino p-nitro chalcone (pNAC) with the coupling components (4,5-diphenylimidazole &2-naphthol) respectively.The new ligands were charecterized with many identificational tools such (H1NMR,FTIR and UV-Visible) spectroscopies, in addation to (CHNO)analysis for ensurance of the preparation of these ligands.A UV-Visible study for the aqueous mixtures of three divalent metal ions (Co,Ni and Cu) were perfomed to determination of the (λmax) of their colored mixtures, also to confirm the solid complexes structures via the determination of the suitable mole ratio (M:L), that all complexes mole ratios were (1:2, M:L). The solid complexes were synthesized and characterized by the obvious techniques, indeed, to the complementary techniques such (electrical conductivity, magnetic susceptibility) for determination of the complex formula and suggested their geometries, from the whole results, octahedral geometry can conculded for nitro chalcone azo imidazole complexes with the observation of the ionic characteristic of its, while the second ligand complexes differ from tetrahedral for (Co & Cu) complexes and square planer for nickel complex.