Acta Cryst. (2005). E61, o4215-o4217  [ doi:10.1107/S1600536805037591 ]

2-Carboxypyridinium hydrogen chloranilate

Y. Tabuchi, A. Takahashi, K. Gotoh, H. Akashi and H. Ishida

Abstract: The title compound, C₆H₆NO₂⁺·C₆HCl₂O₄^-, is the salt of chloranilic acid with nicotinic acid (2-carboxypiridine), where an acid-base interaction involving a proton transfer is observed from the chloranilic acid to the pyridine group of nicotinic acid. In the crystal structure, the hydrogen chloranilate anion and the 2-carboxypridinium cation are linked by N-HO and O-HO hydrogen bonds to form a zigzag chain. The chains are further linked by O-HO hydrogen bonds to form a three-dimensional hydrogen-bond network.

Online 23 November 2005

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