Abstract
Because the results concerning the Cu(II)-histidinehydroxamic acid (Hisha) system are somewhat controversial, we have performed a new study of the Cu(II)-Hisha binary system, using potentiometry and e.p.r. techniques. Since the occurrence of ternary complexes in natural systems is very probable, we have also undertaken potentiometric and spectroscopic studies of the Cu(II)-Hisha-His ternary system, where His is histidine.