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The asymmetric unit of the title compound, C17H20NO3+·C6H5O3S−·H2O, comprises two 1-methyl-2-[(E)-2,4,5-trimethoxystyryl]pyridinium cations, two benzenesulfonate anions and two water molecules. The cations exist in the E conformation with respect to the C=C bond; one cation is essentially planar while the other is slightly twisted, the dihedral angles between the pyridinium and phenyl rings being 1.23 (14) and 6.64 (13)°, respectively. In the crystal, cations, anions and water molecules are linked by O—H
O hydrogen bonds and weak C—HO interactions into chains along the b axis. π–π interactions with centroid–centroid distances in the range 3.5557 (16)–3.6876 (16) Å are observed. C—Hπ interactions and a CO short contact [2.94 (4) Å] are also observed.
O hydrogen bonds and weak C—HO interactions into chains along the b axis. π–π interactions with centroid–centroid distances in the range 3.5557 (16)–3.6876 (16) Å are observed. C—Hπ interactions and a CO short contact [2.94 (4) Å] are also observed.organic compoundsOpen access
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In the title compound, C15H13BrN2O3·H2O, the dihedral angle between the two benzene rings is 13.92 (6)°. The methoxy group of the 4-hydroxy-3-methoxyphenyl is almost coplanar with its bound benzene ring, as seen by the Cmethyl—O—C—C torsion angle of −0.35 (16)°. In the crystal, molecules are linked into a three-dimensional network by N—HO, O—HN and O—HO hydrogen bonds and also weak C—HO interactions. A short CO contact of 3.0191 (15) Å is also present.
O, O—HN and O—HO hydrogen bonds and also weak C—HO interactions. A short CO contact of 3.0191 (15) Å is also present. organic compoundsOpen access
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In the cation of the title compound, C18H23N2+·C7H7O4S−·H2O, one ethyl group of the diethylamino unit is disordered over two sets of sites in a 0.665 (6):0.335 (6) ratio. The styrylpyridinium unit is nearly planar, with a dihedral angle between the pyridinium and benzene rings of 4.27 (8)°. In the crystal, the anion ring is almost perpendicular to the aromatic rings of the cation; the sulfonate-substituted benzene ring forms dihedral angles of 89.60 (8) and 89.37 (8)°, respectively, with the pyridinium and benzene rings of the cation. In the crystal, the three components are linked into a three-dimensional network by O—HO and C—HO hydrogen bonds. π–π interactions with centroid–centroid distances of 3.6999 (9) and 3.7106 (9) Å are also present.
O and C—HO hydrogen bonds. π–π interactions with centroid–centroid distances of 3.6999 (9) and 3.7106 (9) Å are also present.
