title: 2-(4-Hy-droxy-phen-yl)-1H-benzimidazol-3-ium chloride monohydrate.
abstract: The title mol-ecular salt, C13H11N2O(+)·Cl(-)·H2O, crystallizes as a monohydrate. In the cation, the phenol and benzimidazole rings are almost coplanar, making a dihedral angle of 3.18 (4)°. The chloride anion and benzimidazole cation are linked by two N(+)-H⋯Cl(-) hydrogen bonds, forming chains propagating along [010]. These chains are linked through O-H⋯Cl hydrogen bonds involving the water mol-ecule and the chloride anion, which form a diamond core, giving rise to the formation of two-dimensional networks lying parallel to (10-2). Two π-π inter-actions involving the imidazolium ring with the benzene and phenol rings [centroid-centroid distances = 3.859 (3) and 3.602 (3) Å, respectively], contribute to this second dimension. A strong O-H⋯O hydrogen bond involving the water mol-ecule and the phenol substituent on the benzimidazole unit links the networks, forming a three-dimensional structure.
authors.affiliation: Laboratorio de Biofisica y Biocatálisis, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n Casco de Santo Tomás, México, DF 11340, Mexico.
authors.forename: Jazmin E
authors.initials: JE
authors.lastname: González-Padilla
authors.affiliation: Laboratorio de Biofisica y Biocatálisis, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Plan de San Luis y Díaz Mirón s/n Casco de Santo Tomás, México, DF 11340, Mexico.
authors.forename: Martha Cecila
authors.initials: MC
authors.lastname: Rosales-Hernández
authors.affiliation: Laboratorio de Investigación en Química, Departamento de Ciencias Básicas, Unidad Profesional Interdisciplinaria de Biotecnología del Instituto Politécnico Nacional, Av. Acueducto s/n Barrio la laguna Ticoman, México, DF 07340, Mexico.
authors.forename: Itzia I
authors.initials: II
authors.lastname: Padilla-Martínez
authors.affiliation: Laboratorio de Investigación en Química, Departamento de Ciencias Básicas, Unidad Profesional Interdisciplinaria de Biotecnología del Instituto Politécnico Nacional, Av. Acueducto s/n Barrio la laguna Ticoman, México, DF 07340, Mexico.
authors.forename: Efren V
authors.initials: EV
authors.lastname: García-Báez
authors.affiliation: Centro de Investigaciones Químicas, Universidad Autonoma del Estado de Hidalgo, km. 4.5 Carretera Pachuca-Tulancingo, Mineral de la Reforma, Hidalgo 42184, Mexico.
authors.forename: Susana
authors.initials: S
authors.lastname: Rojas-Lima