4(4′-Hydro­xy-3′-methoxy­styryl)-1-methyl­pyridinium 4-bromo­benzene­sulfonate

In the title compound, C₁₅H₁₆NO₂⁺·C₆H₄BrSO₃⁻, the cation is almost planar. The benzene ring of the anion makes dihedral angles of 82.00 (8) and 74.96 (8)° with the mean planes through the benzene ring of the cation and the pyridinium ring, respectively. In the solid state, the cations and anions are packed as alternate layers parallel to the ac plane. These layers are interconnected through O—H...O, C—H...O and C—H...π interactions to form a three-dimensional network.

4-(4′-Hydroxy-3′-methoxy­styr­yl)-1-methyl­pyridinium 4-chloro­benzene­sulfonate

The title compound, C₁₅H₁₆NO₂⁺·C₆H₄ClO₃S⁻, is isomorphous with the 4-bromo­benzene­sulfonate derivative. The cation is almost planar and the benzene ring of the anion makes dihedral angles of 82.79 (1) and 76.39 (1)° with the mean planes through the benzene ring of the cation and the pyridinium ring, respectively. The cations and anions are packed as alternate layers parallel to the ac plane. These layers are inter­connected through O—H...O, C—H...O and C—H...π inter­actions to form a three-dimensional network.

2-[(E)-2-(3-Hydr­oxy-4-methoxy­phen­yl)ethen­yl]-1-methyl­quinolinium 4-methyl­benzene­sulfonate

In the title compound, C₁₉H₁₈NO₂⁺. C₇H₇SO₃⁻, the cation is almost planar and the benzene ring of the anion makes dihedral angles of 59.17 (9) and 60.59 (10)° with the mean planes through the quinolinium and benzene ring of the cation, respectively. The cations and anions are packed as alternate layers along the b axis. These layers are inter­connected through O—H...O and C—H...O inter­actions to form a three-dimensional network. The structure is stabilized by these inter­actions and C—H...π inter­actions.