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

In the title compound, C(16)H(14)NS(+)·I(−), the cation has an E configuration about the C=C double bond of the ethyl­ene unit. The dihedral angle between the thio­phene ring and the quinolinium ring system is 11.67 (11)°. A weak C—H⋯S intra­molecular inter­action involving the thio­phene ring generates an S(5) ring motif. In the crystal structure, the iodide ion, located between the cations arranged in an anti­parallel manner, forms weak C—H⋯I inter­actions. The crystal structure is further stabilized by a π–π inter­action between the thio­phene and pyridine rings; the centroid–centroid distance is 3.6818 (13) Å.