Acta Cryst. (2009). E65, o1549-o1550  [ doi:10.1107/S1600536809021679 ]

2-[(E)-2-(4-Chlorophenyl)ethenyl]-1-methylpyridinium 4-methoxybenzenesulfonate

K. Chanawanno, S. Chantrapromma and H.-K. Fun

Abstract: In the asymmetric unit of the title salt, C₁₄H₁₃ClN⁺·C₇H₇O₄S^-, there are two crystallographically independent molecules for each component. Each cation adopts an E configuration with respect to the C=C bond and is slightly twisted; the dihedral angle between the pyridinium and benzene rings is 6.53 (7)° for one molecule and 5.30 (7)° for the other. The methoxy groups in the anion molecules are each twisted from the mean plane of benzene ring with torsion angles of 16.38 (19) and 4.32 (19)°. In the crystal structure, the cations are stacked in an antiparallel manner along the a axis and the anions are linked together by C-HO interactions into a layer parallel to (001). The anion layers are further linked to adjacent cations by C-HO interactions. C-H interactions involving the benzene rings of both ions are also observed.

Online 10 June 2009

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