2-[(E)-2-(4-Ethoxyphenyl)ethenyl]-1-methylpyridinium 4-bromobenzenesulfonate monohydrateThis paper is dedicated to His Majesty King Bhumibol Adulyadej of Thailand (King Rama IX) for his sustainable development of the country.

2-[(E)-2-(4-Ethoxyphenyl)ethenyl]-1-methylpyridinium 4-bromobenzenesulfonate monohydrateThis paper is dedicated to His Majesty King Bhumibol Adulyadej of Thailand (King Rama IX) for his sustainable development of the country.

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In the title compound, C16H18NO+·C6H4BrO3S−·H2O, the cation exists in an E truvisionhealthftp.com configuration with respect to the ethenyl bond and is slightly twisted with a dihedral angle of 8.5 (2)° between pyridinium and benzene rings.In the crystal, the cations are arranged in layers parallel to (100), with π–π interactions between pyridinium and benzene rings [centroid–centroid distances = 3.651 (3) and 3.613 (3) Å].

The anions and water molecules are turbo air m3f72-3-n located between the cationic layers.The ions and water molecules are linked into a three-dimensional framework by O—H.O and C—H.O hydrogen bonds.