Acta Cryst. (2009). E65, o1554-o1555  [ doi:10.1107/S1600536809021667 ]

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

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

Abstract: In the title salt, C₁₄H₁₃ClN⁺·C₆H₄ClO₃S^-, the cation exists in an E configuration with respect to the ethynyl bond and is approximately planar, with a dihedral angle of 3.4 (2)° between the pyridinium and benzene rings. The anion is approximately perpendicular to the cation plane, the benzene ring of the anion making dihedral angles of 89.4 (2) and 89.9 (2)°, respectively, with the pyridinium and benzene rings of the cation. In the crystal structure, the cations are linked into a chain along the c axis by C-HCl interactions. The anions are linked to the adjacent cation chains by C-HO and C-HCl interactions, forming a two-dimensional network parallel to the bc plane. The crystal structure is further stabilized by C-H interactions. A - interaction is also observed between the pyridinium ring and the benzene ring of the cation with a centroid-centroid distance of 3.668 (3) Å.

Online 13 June 2009

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