G. Chakkaravarthi

TL;DR: In the anion of the title molecular salt, C7H7N2 +·C7H5O3 − (systematic name: 1H-benzimidazol-3-ium 2-hydroxybenzoate), there is an intramolecular O—H⋯O hydrogen bond that generates an S(6) ring motif, forming a four-membered centrosymmetric arrangement.

TL;DR: The title molecular salt, C8H12N+·C7H5O3 − arose from the proton-transfer reaction between 2,5-xylidine and salicylic acid, and features weak C—H⋯O bonds and aromatic π–π stacking [centroid-to-centroid distance = 3.7416 (10) Å] interactions, which lead to a three-dimensional network.

TL;DR: In this paper, the benzimidazolium ring system is almost planar (r.m.s. deviation = 0.012) and the anions are linked via three N-H⋯O hydrogen bonds involving the NH3+ group, forming layers parallel to the ab plane.

TL;DR: The asymmetric unit of the title compound, C8H12N+·C7H5O3−·C8H11N·C 7H6O3, contains a 2.5-di-methyl-anilinium cation, 4-hy-droxy-benzoate anion and neutral 2,5-dimm-methylaniline and 4-hydroxylbenzoic acid mol-ecules as discussed by the authors.

TL;DR: The title molecular salt, C4H8N3O+·C7H7O3S−, is composed of a 2-amino-1-methyl-4-oxo-4,5-dihydro-1H-imidazol-3-ium cation and a 4-methylbenzene-sulfonate anion as discussed by the authors.