Mixed-ligand heteronuclear complexes of dysprosium(3) and copper(2)

Complexing in ternary [copper(2)-dysprosium(3)-H3M] and quaternary [copper(2)-dysprosium(3)-H3M-H2L] systems has been studied by the method of proton magnetic relaxation in a wide range of hydrogen, metal and ligand ion concentrations. It is shown that in a low-alkaline medium complex Cu2Dy2M55- is accumulated in the ternary system, while complex CuDyM2L3- - in the quaternary one. Equilibrium constants characterizing mutual transformations of the relevant complex forms have been calculated. By the method of computer modeling the complexes distribution diagrams have been obtained. 15 refs.; 3 figs