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Acta Cryst. (2012). E68, o2728-o2729
[ doi:10.1107/S1600536812035258 ]

(E)-2-[4-(Diethylamino)styryl]-1-methylpyridinium 4-methoxybenzenesulfonate monohydrate

S. Chantrapromma, N. Kaewmanee, N. Boonnak, T. Anantapong and H.-K. Fun

Abstract: In the cation of the title compound, C18H23N2+·C7H7O4S-·H2O, one ethyl group of the diethylamino unit is disordered over two sets of sites in a 0.665 (6):0.335 (6) ratio. The styrylpyridinium unit is nearly planar, with a dihedral angle between the pyridinium and benzene rings of 4.27 (8)°. In the crystal, the anion ring is almost perpendicular to the aromatic rings of the cation; the sulfonate-substituted benzene ring forms dihedral angles of 89.60 (8) and 89.37 (8)°, respectively, with the pyridinium and benzene rings of the cation. In the crystal, the three components are linked into a three-dimensional network by O-H...O and C-H...O hydrogen bonds. [pi]-[pi] interactions with centroid-centroid distances of 3.6999 (9) and 3.7106 (9) Å are also present.


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