Syntheses, structures and properties of five coordinating metallic complexes with the new carboxylate-bis(tetrazolyl)amine ligand

Five new coordination compounds based on edtza or (datza)2− ligands [edtza = ethyl-[N2(N3),N2′-di(tetrazol-5-yl) amine] acetate and (datza)2− = [di(tetrazol-5-yl)] amine-N2(N3),N2′-diacetato anion] [Scheme 1], namely, binuclear cluster [Cd2(edtza)4(H2O)2]·2H2O (1) and 2-D polymers, [Ca(datza)(H2O)]·2H2O (2), [M(datza)(H2O)] [M = Co (3), Mn (4)] and [Sr(datza)(H2O)] (5) have been successfully synthesized. They were characterized by elemental analysis, IR and single crystal X-ray diffraction analysis. The different crystal structures were controlled by not only the different coordinating and bridging modes of the edtza or (datza)2− ligands but also simultaneously the formation of complementary intermolecular hydrogen bonds. Furthermore, the luminescence properties of 1–5 were investigated at room temperature in the solid state.