1-Benzyl-3-[(trimethyl­sil­yl)meth­yl]benzimidazolium chloride monohydrate

The title compound, C(18)H(23)N(2)Si(+)·Cl(−)·H(2)O, was synthesized from 1-[(trimethyl­sil­yl)meth­yl]benzimidazole and benzyl chloride in dimethyl­formamide. The benzimidazole ring system is approximately planar, with a maximum deviation of 0.022 (2) Å, and makes an angle of 74.80 (12)° with the phenyl ring. The crystal packing is stabilized by O—H⋯Cl, C—H⋯Cl, C—H⋯O and C—H⋯π inter­actions between symmetry-related mol­ecules together with π–π stacking inter­actions between the imidazolium and benzene rings [centroid–centroid distance = 3.5690 (15) Å] and between the benzene rings [centroid–centroid distance = 3.7223 (14) Å].