1-Methyl-2-[(E)-2-(2-thienyl)ethenyl]quinolinium 4-bromobenzenesulfonate

In the title compound, C(16)H(14)NS(+)center dot C(6)H(4)BrO(3)S(-), the cation exists in an E configuration and is essentially planar, the dihedral angle between the quinolinium and thiophene rings being 3.45 (9)degrees. The anion is inclined to the cation with dihedral angles of 75.43 (8) and 72.03 (11)degrees, respectively between the benzene ring and the quinolinium and thiophene rings. In the crystal, the cations and anions are arranged individually into separate chains along the c axis. The cation chains are stacked in an antiparallel manner along the a axis by pi center dot center dot center dot pi interactions with centroid-centroid distances of 3.7257 (13) and 3.7262 (14) angstrom. Weak C-H center dot center dot center dot O and C-H pi center dot center dot center dot pi interactions link the cations and anions into a three-dimensional network. Short Br center dot center dot center dot S [3.7224 (5) angstrom] and Br center dot center dot center dot O [3.4267 (16) angstrom] contacts are also observed.