Antidiarrhetic loperamide hydrochloride

Abstract

Single crystals of the anhydrous form of the title compound {systematic name: 1-[3-(dimethylcarbamoyl)-3,3-diphenylpropyl]-4-hydroxy-4-(4-chlorophenyl)piperidin-1-ium chloride}, C29H34ClN2O2+·Cl−, were obtained by diffusion of acetone into a solution in 2-propanol. In the structure, N—H...Cl−and O—H...Cl−hydrogen bonds connect neighbouring molecules and chloride anions to form chains along thec-axis direction. Neighbouring chains along theb-axis direction are connected by intermolecular C—H...Cl−contacts, defining layers parallel to the (100) planes. The layers are connected by weak intermolecular C—H...Cl interactions only, which may account for the plate-like shape of the crystals.