Studies on Mixed-Ligand Complexes of Cobalt(II), Nickel(II), Copper(II) and Zinc(II) with Aminosubstituted Benzoic Acids and Nitrilotriacetic Acid

Abstract

The technique of paper electrophoresis was used to determine the stability constants of mixed ligand complexes of Co(II), Ni(II), Cu(II) and Zn(II) using 2-aminobenzoic acid (2–ABA), 3-aminobenzoic acid (3–ABA) and 4-aminobenzoic acid (4–ABA) as primary ligand and nitrilotriacetic acid (NTA) as secondary ligand at 25 ± 1ºC at a fixed ionic strength μ═ 0.1 M HClO₄, in aqueous solution.