Mixed ligand complex formation by copper(II) ion

Abstract

Copper(II) ion forms mixed complexes, CuAB, containing two different ligand molecules, with each of the six possible pairs of the ligands ethylenediamine, histamine, serine monoanion, and salicylate dianion. A general computer programme has been developed to calculate the stability constants of these mixed complexes from pH titration data on 1 : 1 : 1 mixtures of copper(II) and the two ligands. These constants are of comparable magnitude with the constants for the corresponding bis-complexes CuA₂ and CuB₂.