A study on the complex formation between copper(II) and some ephedrines

Abstract Complex formation between the copper(II) ion and ephedrine and norephedrine has been studied potentiometrically and spectrophotometrically. A spectral-structural correlation has been investigated for the complexes. Copper ephedrine and norephedrine complexes possessed a geometry which varied from octahedral to tetragonal to square planer depending on the experimental conditions. Semi-empirical MO calculations were performed on a model “copper-ephedrine complex” with different geometries, with satisfactory results.