N-(4-Chloro­phen­yl)-4-nitro­benzene­sulfonamide

In the title compound, C₁₂H₉ClN₂O₄S, the dihedral angle between the benzene rings is 31.4 (2)°. In the crystal, N—H...O hydrogen bonds link the mol­ecules into C(4) chains running along the a-axis direction.

N-(2,3-Dichloro­phen­yl)-2-nitro­benzene­sulfonamide

In the title compound, C₁₂H₈Cl₂N₂O₄S, the N—C bond in the C—SO₂—NH—C segment has gauche torsions with respect to the S=O bonds. Further, the N—H bond is syn to the ortho-nitro group in the sulfonyl benzene ring and also syn to both the ortho- and meta-Cl atoms in the aniline ring. The mol­ecule is twisted at the S—N bond with a torsion angle of 61.15 (18)°. The dihedral angle between the planes of the benzene rings is 68.00 (6)°. The amide H atom exhibits an intra­molecular bifurcated N—H...(O,O) hydrogen bond. In the crystal, pairs of N—H...O(S) hydrogen bonds link the mol­ecules into inversion dimers with R₂²(8) motifs.