A BINUCLEAR COPPER(II) COMPLEX OF THE DEPROTONATED ANION OF N,N'-DIGLYCYLETHYLENEDIAMINE

The title compound, kappaO';1kappaN'-kappaO':2kappa2N,N''-dicopper(II) diperchlorate tetrahydrate, [Cu2(C6H13N4O2)2(H2O)2]2ClO4.4H2O, in whi ch only one of the two amide protons of each N,N'-diglycylethylenediam ine is released in solution, exists as a binuclear complex with invers ion symmetry in the solid state. Each Cu(II) ion is five-coordinate wi th a distorted square-pyramidal geometry. Two donar N atoms of one tet radentate ligand and one N atom and one O atom of the other ligand for m a slightly distorted plane and a water O atom occupies the axial pos ition. Hydrogen bonds help stabilize the crystal structure.