Acta Cryst. (2013). E69, m661-m662 [ doi:10.1107/S1600536813030687 ]
Abstract: In the title organic-inorganic hybrid compound, (C5H7N2)2[ReVW4O19]·7H2O, the Lindqvist-type polyoxido anion has crystallographically imposed mm2 symmetry and is built up by six MO6 (M = W, V, Re) edge-sharing distorted octahedra. The Re and V atoms share the same crystallographic site in a 0.5:0.5 ratio. The 4-aminopyridinium cations lie on a mirror plane. Three of the four independent water O atoms in the asymmetric unit are located on a mirror plane whereas the remaining O atom has mm2 site symmetry. In the crystal, the cations, anions and water molecules are linked into a three-dimensional network through O-HO and N-HO hydrogen-bonding interactions.
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