title: 2-Hy-droxy-methyl-1,3-dimethyl-1H-benzimidazol-3-ium iodide.
abstract: In the cation of the title compound, C10H13N2O(+)·I(-), all non-H atoms, with the exception of the O atom, are essentially coplanar, with a maximum deviation of 0.04 (1) Å. In the crystal, the cations and anions are arranged in layers parallel to (100). The cations are connected to the anions via an O-H⋯I hydrogen bond and there are significant π-π stacking inter-actions between cation layers, with centroid-centroid distances in the range 3.606 (5)-3.630 (5) Å. A weak intra-molecular C-H⋯O hydrogen bond is also observed. The crystal studied was an inversion twin with refined components of 0.52 (5) and 0.48 (5).
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale, CHEMS, Université Constantine 1, 25000, Algeria.
authors.forename: Mohamed El Hadi
authors.initials: Mel H
authors.lastname: Said
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale, CHEMS, Université Constantine 1, 25000, Algeria.
authors.forename: Sofiane
authors.initials: S
authors.lastname: Bouacida
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale, CHEMS, Université Constantine 1, 25000, Algeria.
authors.forename: Hocine
authors.initials: H
authors.lastname: Merazig
authors.affiliation: Laboratoire des Produits Naturels d'Origine Végétale et de Synthèse Organique, PHYSYNOR, Université Constantine 1, 25000 Constantine, Algeria.
authors.forename: Ali
authors.initials: A
authors.lastname: Belfaitah
authors.affiliation: Unité de Recherche de Chimie de l'Environnement et Moléculaire Structurale, CHEMS, Université Constantine 1, 25000, Algeria.
authors.forename: Aissa
authors.initials: A
authors.lastname: Chibani
authors.affiliation: Laboratoire des Produits Naturels d'Origine Végétale et de Synthèse Organique, PHYSYNOR, Université Constantine 1, 25000 Constantine, Algeria.
authors.forename: Abdelmalek
authors.initials: A
authors.lastname: Bouraiou