organic compounds
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In the imidazolium cation of the title compound, C19H19N4O2+·Cl−·C3H7NO, the dihedral angles between the imidazole ring and the phenyl rings are 85.86 (4) and 70.26 (5)°. In the crystal, N—HCl hydrogen bonds link the imdiazolium cations and chloride anions into zigzag chains along [110] and together with C—HCl and C—HO hydrogen bonds, which involve also the dimethylformamide solvent molecule, form a two-dimensional network extending across the ab plane.