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Title: Bis(4-aminopyridinium) sulfate monohy-drate
Authors: Quah, C.K.
Fun, H.-K.
Isloor, A.M.
Isloor, N.
Issue Date: 2010
Citation: Acta Crystallographica Section E: Structure Reports Online, 2010, Vol.66, 9, pp.o2250-o2251
Abstract: The asymmetric unit of the title compound, 2C5H 7N2 + SO4 2- H2O, contains two 4-aminopyridinium cations (A and B), a sulfate dianion and a water molecule. One of the 4-aminopyridinium cations (B) is disordered over two orientations with refined site occupancies of 0.568 (4) and 0.432 (4). The non-H atoms of the 4-aminopyridinium cations are essentially coplanar, with a maximum deviation of 0.055 (1) (in cation A), 0.022 (3) (for the major component in cation B) and 0.009 (3) (for the minor component in cation B). In the crystal, the sulfate O atoms link the 4-aminopyridinium cations and water molecules into a three-dimensional network via intermolecular O-H?O, N-H?O and C-H?O hydrogen bonds. The crystal structure is further consolidated by N-H?O(water) and C-H?O(water) hydrogen bonds.
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