Assemblies based on trans-oxamidato-bridged copper(II) building blocks and the spacer succinate

Two compounds with the composition [Cu2(trans-L)(suc)(H2O)2]n·2nH2O (L=oxap 1, oxen 2; suc=succinate) were obtained from the assembly of trans-oxamidato-bridged binuclear motif [Cu2(trans-L)]2+ and suc and their structures were determined by X-ray crystallography. Both compounds contain 1-D zigzag polymeric chains with the Cu(II) atoms alternately linked together by L and suc via covalent bonding interactions. Hydrogen-bonding interactions in them are abundant and very different. Their thermal properties were studied.