Studies on polyhalides .26. On N-propylurotropinium polyiodides UrPrI(x) with x=5 and 7: Crystal structures of a pentaiodide and a heptaiodide

The salts UrPrI(x) with x = 5 and 7 are formed by the reaction of N-propylurotropinium iodide UrPrI with excess iodine I, at room temperature from aqueous solution. N-propylurotropinium pentaiodide C9H19N4I5 crystallizes monoclinically in P2(1)/n with a = 1007.6(3) pm, b = 1362.5(3) pm, c = 2899.0(9) pm, beta = 91.49(3)degrees and Z = 8. The crystal structure is built up from parallel chains of cations UrPr(+) and pairs of V-shaped pentaiodide anions I-5(-) along [010]. N-propylurotropinium heptaiodide C9H19N4I7 crystallizes triclinically in <P(1)over bar> with a = 970.4(1) pm, b = 971.1(1) pm, c = 1357.8(2) pm, alpha = 106.83(1)degrees, beta = 92.28(1)degrees, gamma = 105.17(1)degrees and Z = 2. The crystal structure is stacked by alternating cationic and anionic double layers along [001]. The heptaiodide layer shows a two-dimensional network.