(1-Phenyl-sulfonyl-1H-indol-2-yl)(thio-phen-2-yl)methanone.

The crystal studied of the title compound, C(19)H(13)NO(3)S(2), was found to be a non-merohedral twin with a domain ratio of 0.877 (3):0.123 (3). There are two independent mol-ecules in the asymmetric unit. The dihedral angles between the mean plane of the indole ring system and the phenyl-sulfonyl ring are 71.67 (13) and 71.95 (13)° in the two mol-ecules while the indole unit and the thiophene ring make dihedral angles of 54.91 (12) and 56.92 (13)° in the two molecules. The crystal packing is stabilized by weak C-H⋯π inter-actions.