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

• Main Authors: Kullapa Chanawanno, Suchada Chantrapromma, Hoong-Kun Fun
• Format: Article
• Language: English
• Published: International Union of Crystallography 2009-07-01
• Series: Acta Crystallographica Section E
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S1600536809021679

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—H...O interactions into a layer parallel to (001). The anion layers are further linked to adjacent cations by C—H...O interactions. C—H...π interactions involving the benzene rings of both ions are also observed.