2-(1H-Benzimidazol-2-ylsulfanyl)butanoic acid

Journal article, 2006

The title compound, C11H12N2O2S, forms ionic crystals consisting of protonated benzimidazole cations and carboxylic acid anions, C11H13N2O2+·C11H11N2O2-. In both ions, the bicyclic 1H-benzimidazole core is essentially planar. The plane of the 2-alkylsulfanyl substituent is almost coplanar with the benzimidazole plane. The three-dimensional packing is stabilized by strong intermolecular N-H...O and O-H...N interactions and weak C-H...O intermolecular hydrogen bonds.