Stereoselective effect on ternary complexation of copper ions with N,N′-dimethyltartramide and mandelic acid

Abstract

The binary and ternary complexation in aqueous solution between copper(II) ion,N,N′-dimethyltartramide (H2A) and mandelic acid (HB), were studied by potentiometric measurements in the 5–10 pH range at 25 °C and μ = 1 M in NaClO4. The titrations were analyzed using a pit-mapping method and the concentration distribution of the various simple and mixed complexes were plotted versus a pH gradient. A significant stereoselective effect is displayed in the ternary complexes only.