1-Methyl-4-[(E)-2-(2-thienyl)ethenyl]pyridinium 4-chlorobenzenesulfonateThis paper is dedicated to the late Her Royal Highness Princess Galyani Vadhana Krom Luang Naradhiwas Rajanagarindra for her patronage of Science in Thailand.

1-Methyl-4-[(E)-2-(2-thienyl)ethenyl]pyridinium 4-chlorobenzenesulfonateThis paper is dedicated to the late Her Royal Highness Princess Galyani Vadhana Krom Luang Naradhiwas Rajanagarindra for her patronage of Science in Thailand.

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In the title compound, C12H12NS+·C6H4ClO3S−, the cation is almost planar and exists in the E Scarves configuration.The cations and anions form alternate layers parallel to the ab plane.Within each layer, both cations and anions form chains directed along the b axis.The molecules are interconnected by weak C—H.O Strings interactions into a three-dimensional network.

The crystal structure is further stabilized by C—H.π interactions involving the thiophene ring.The sulfonate and thiophene groups are involved in weak intramolecular C—H.O and C—H.S interactions, respectively.

The latter intramolecular hydrogen bonds produce S(5) ring motifs.