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Acta Cryst. (2014). E70, o83-o84  [ doi:10.1107/S1600536813033254 ]

1-(2,3-Di­hydroxy­prop­yl)-4-{2-[4-(di­methyl­amino)­phen­yl]vin­yl}pyridinium chloride

G. J. Gainsford, M. D. H. Bhuiyan and A. J. Kay

Abstract: The title compound, C18H23N2O2+·Cl-, crystallizes with two independent cations and anions per cell. Each cation has twofold rotational disorder about the linking vinyl groups but with unequal occupancies [0.963 (5):0.037 (5) and 0.860 (8):0.140 (8)]. The two independent cations are close to being related by an inversion centre but the data does not support the expected centrosymmetric space-group assignment. The conclusion is that the differing rotational disorder has lead to an overall non-centrosymmetric lattice. In the crystal, the mol­ecules pack in layers parallel to (133) and (-13-3), chain-linked with motif C12(7) by the di­hydroxy­propyl O-H...Cl...H-O hydrogen bonds. Other lattice binding is provided by O-H...Cl, C-H...Cl and C-H...N inter­actions.

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