STRUCTURE OF PROPANE-1,3-DIAMMONIUM MONOHYDROMONOPHOSPHATE MONOHYDRATE

C3H12N2(2+).HPO4(2-).H2O, M(r) = 190.14, monoclinic, P2(1)/c, a = 6.956 (2), b = 16.654 (3), c = 7.782 (1) angstrom, beta = 113.80 (1)-degrees, V = 824.8 (6) angstrom 3, Z = 4, D(m) = 1.544, D(x) = 1.531 Mg m-3, lambda-(Ag K-alpha) = 0.5608 angstrom, mu = 1.647 mm-1, F(000) = 408, T = 298 K. The structure was solved by the Patterson method and refined to a final R value of 0.049 for 1764 observed independent reflections. The acidic phosphoric groups are connected through O-H...O hydrogen bonds, so that infinite chains parallel to the c axis with anionic period [H2P2O8(H2O)]4- are formed in the structure. The chains are themselves interconnected by means of N-H...O hydrogen bonds originating from the [NH3(CH2)3NH3]2+ dication so as to build a three-dimensional network.