(Z)-4-Chloro-N-{3-[(4-chlorophenyl)sulfonyl]-2,3-dihydrobenzo[d]thiazol-2-ylidene}benzene-sulfonamide.

The title compound, C19H12Cl2N2O4S3, is related to a ditosylated 2-iminobenzothiazole with the two methyl groups on the two phenyl rings replaced by chlorine. There is a weak intramolecular π-π contact between the two phenyl rings, with a centroid-to-centroid distance of 4.004 (2) Å. The dihedral angle between the rings is 9.96 (13)°. An intramolecular C-H⋯O hydrogen bond stabilizes the molecular conformation.