Mattia Lopresti
The title compound, C7H7N2 +·Cl-·H2O, crystallizes in the ortho-rhom-bic space group Pnma. The organic mol-ecule lies on a crystallographic mirror plane, resulting in an asymmetric unit comprising one-half of a benzimidazolium cation. The crystal packing features N-H⋯Cl, O-H⋯O, and O-H⋯Cl hydrogen bonds, which connect the ionic and neutral components into a three-dimensional supra-molecular framework. The compound was obtained serendipitously during investigations of reactions involving NbCl5 and o-phenyl-enedi-amine.