Buy article online - an online subscription or single-article purchase is required to access this article.
organic compounds
The crystal structure of the title compound, 1-[1-(p-chlorobenzyl)-2-(1-pyrrolidinylmethyl)benzimidazolium chloride, C19H21ClN3+.Cl−, a potent anti-allergic agent, has been determined. The crystals are composed of independent cations which are hydrogen bonded to chloride ions, with an NCl distance of 3.021 (6) Å and an N—HCl angle of 173°.