Macrocyclic dioxadiaza from the reaction of the (1,8-diamino-3,6-dioxaoctane)copper(II) cation with formaldehyde and the carbon acids nitroethane or diethylmalonate

New square-planar copper(II) complexes of 13-membered diazadioxa macrocyclic ligands have been prepared by the one-pot template reactions of formaldehyde, 1,8-diamino-3,6-dioxaoctane with the carbon acids nitroalkane or diethylmalonate in the presence of the copper(II) ion. The spectra of the complexes show that the two nitrogen and two oxygen atoms are coordinated to the copper(II) ion.