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N-[3-(2,6-Dimethylanilino)-1-methylbut-2-enylidene]-2,6-dimethylanilinium chloride1
The title salt, C21H27N2
+·Cl− resulted from the condensation between 2,6-dimethylÂaniline and acetylÂacetone in acidified ethanol. The bulky cation is stabilized in a β-iminoÂenamine tautomeric form, and presents a W-shaped conformation. The benzene rings are arranged almost parallel, with a dihedral angle of 6.58 (4)° between the mean planes. Both N—H groups in the cation form strong hydrogen bonds with two symmetry-related chloride anions. The resulting supraÂmolecular structure is a one dimensional polymer running along [001], alternating cations and anions. The π–π interÂaction observed in the molÂecule, characterized by a centroid–centroid separation of 4.298 (4) Å, is thus extended to the chains, with separations of 5.222 (4) Å between benzene rings of neighbouring cations in the crystal