Synthesis and spectral study of Co(II) and Cu(II)complexes using the ligand 2-(2-naphthyl azo)- 4,5-diphenyl imidazole

Abstract

In this study the ligand 2-(2- naphthyl azo) -4,5-diphenyl imidazole was
prepared by the reaction between 2- naphthyl amine and 4,5-diphenyl imidazole in
alkaline alcoholic solution. The ligand was examined by using element analysis, UVVis.
and infrared spectra. Also this research involved the rapid and sensitive
determination of cobalt(II) and copper(II) using this ligand at (λmax =550 and 556) nm
and pH ( 9.2 and 5.9) respectively and the mole ratio was 1:2 (metal : ligand ). Beer ̀s
law is obeyed in the range (1x10-4- 5x10-4)M of Co(II) and (1x10-5-5x10-5) M of
Cu(II) with molar absorpitivity (Є =2250-1550) L.mole-1.cm-1 respectively, also these
complexes were examined by using the same methods .