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The asymmetric unit of the title compound, C6H5Cl2NO2S, contains two molecules with similar conformations (r.m.s. overlay fit for the non-H atoms = 0.067 Å). Atoms attached to the pendent Csp3—S bond are arranged in a staggered conformation with one of the Cl atoms anti to the C atom in the aromatic ring [C—S—C—Cl torsion angles = 178.41 (11) and −176.70 (13)°]. In the crystal, molecules are linked by C—HN and C—HO hydrogen bonds, generating a three-dimensional network, and weak aromatic π–π stacking is also observed [centroid–centroid separation = 3.8902 (17) Å].