Benzimidazolium 3,5-dihydroxybenzoate

Abstract

In the crystal structure of the title compound, C7H7N2+·C7H5O4−, the partially overlapped arrangement and the face-to-face separation of 3.557 (7) Å suggest π–π stacking between parallel benzimidazolium cations, and the C—H⋯Cg angle of 173° and H⋯Cg separation of 2.64 Å (where Cg is the centroid of the benzene ring) suggest C—H⋯π stacking between the benzimidazolium cation and dihydroxy­benzoate anion. Classical N—H⋯O and O—H⋯O and weak C—H⋯O hydrogen bonds consolidate the crystal structure.