Acta Cryst. (2004). E60, o1856-o1858  [ doi:10.1107/S1600536804023281 ]

Benzimidazolium hydrogen bis(3-carboxyphenoxyacetate)

S. Gao, L.-H. Huo, C.-S. Gu, H. Zhao and S. W. Ng

Abstract: The anion in the structure of the title compound, C₇H₇N₂⁺·H⁺·2C₉H₇O₅^-, has a CO₂H unit on the aromatic ring. Two anions are linked through an `acid H' atom (which lies on a center of inversion) to give a monoanionic entity. Adjacent entities are linked into a linear chain through hydrogen bonding involving the CO₂H units. The chains are connected into a layer structure through the benzimidazolium cations, which possess C₂ symmetry.

Online 25 September 2004

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