Acta Cryst. (2005). E61, o2764-o2767 [ doi:10.1107/S1600536805023871 ]
Abstract: In the title complex, 2C6H6NO2+·SO42-, the carboxyl groups of the two nicotinium cations (A and B) are twisted from the pyridinium ring, with dihedral angles of 9.1 (5) and 7.0 (9)°, respectively. Packing involves classical O-HO and N-HO hydrogen bonds. Cations A are interlinked through an O atom of the sulfate anion, forming an infinite chain running along the b axis and leading to cationic layers separated by a distance of 3.106 (4) Å. Cations B form an inversion-related closed hydrogen-bonded loop.
Online 30 July 2005
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