formation of binuclear complexes with multidentate ligands 1 the Co [II], Ni [II] and Cu [II] complexes with 2-carboxyphenylazosalicylaldehyde

ABSTRACT

The formation of complexes of Co [II], Ni [II] and Cu [II] with o-carboxyphenylazosalicylaldehyde are studied by potential-metric and conductometric titrations. The stoichiometry of complexes are also studied by spectrophotometry. The proton-reagent stability constant and conditional formation constant are determined. DTA and ir spectra are also used to study the binuclear complexes formed. The results show that the ligand in the case of the binuclear metal chelates functions as a dibasic tetradentate group