The crystal structure of the title compound was determined by single-crystal X-ray diffraction. The compound crystallizes in a monoclinic system and was characterized thus: P21/n, a = 8.6189(2)Å, b = 17.9591(7)Å, c = 18.4009(6) Å, b = 102.2560(19)˚, Z = 4, V = 2783.32(16)Å3. In the mono nuclear macrocyclic complex the copper(II) ion resides at the N(imine)2O2 coordination site, whereas the other compartment, N(amine)2O2, is occupied by a proton. The geometry around copper(II) is square-planar.
