Hydrothermal synthesis, structures and characterization of two new copper(II) triphosphonate compounds

Two copper(II) triphosphonate compounds, Cu[(APTPH(4))(phen)(H2O)]center dot 2.16H(2)O (1) and [Cu(APTPH(4))(2,2 '-bipy)(H2O)]center dot 2.63H(2)O (2), have been prepared by a low temperature hydrothermal reaction from 1-aminopropane-1,1,3-triphosphonic acid (APTPH(6)), CuO and a second ligand, phen 1,10-phenanthroline, or 2,20-bipy 2,20-bipyridyl. These two compounds were characterized by single crystal X-ray diffraction, elemental analysis, IR and TG. Crystal data for 1: Monoclinic, space group P2(1)/c, a = 14.4830(7) angstrom, b = 9.1721(5) angstrom, c = 16.7403(8) angstrom, beta = 90.101(2)degrees. For compound 2: Triclinic, space group P (1) over bar, a = 7.1215(7) angstrom, b = 10.460(2) angstrom, c = 14.671(2) angstrom, alpha = 82.983(2)degrees, beta = 83.882(2)degrees, gamma = 80.617(2)degrees. In both compounds, each Cu2+ ion is five-coordinate with two oxygen atoms from the triphosphonate, two nitrogen atoms from the second ligand and one water molecule, to form a distorted square-pyramidal geometry. Both complexes have 3D supramolecular structures constructed by hydrogen bonds and pi-pi stacking interactions.