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In the cation of the title compound, 4-[2-(4-hydroxy-3-methoxyphenyl)ethenyl]-1-methylpyridinium 4-tolylsulfonate hydrate, the pyridyl ring makes a dihedral angle of 3.63 (5)° with the phenyl ring. The phenyl ring in the anion makes a dihedral angle of 86.3 (2)° with the best mean plane of the cation. Layers of cations and layers of anions are interleaved, and connected by hydrogen bonds to the water molecule.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablock y434

fcf

Structure factor file (CIF format)
Contains datablock y434

CCDC reference: 128510

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