Acta Cryst. (2009). E65, o76-o77  [ doi:10.1107/S1600536808040671 ]

(E)-2-[4-(Dimethylamino)styryl]-1-methylquinolinium 4-methylbenzenesulfonate monohydrate

T. Kobkeatthawin, T. Suwunwong, S. Chantrapromma and H.-K. Fun

Abstract: In the title compound, C₂₀H₂₁N₂⁺·C₇H₇O₃S^-·H₂O, the cation is essentially planar, as indicated by the dihedral angle of 2.79 (13)° between the quinolinium and the dimethylaminophenyl rings, and exists in the E configuration. The -conjugated planes of the cation and the anion are inclined to each other at a dihedral angle of 66.95 (12)°. The cation is linked to the anion through C-HO hydrogen bonds and the anion is further linked with the water molecule by O-HO hydrogen bonds, forming a three-molecule unit. These units are arranged in a face-to-face manner into a ribbon-like structure along the b axis. The ribbons are stacked along the c axis. The crystal structure is further stabilized by C-H interactions involving the dimethylaminophenyl and methylphenyl rings. A - interaction with a centroid-centroid distance of 3.6074 (19) Å is also observed.

Online 10 December 2008

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