2-Chloro-5-(2-iodo-benzene-sulfonamido)-benzoic acid

2-Chloro-6-(2,3-di-chloro-benzene-sulfonamido)-benzoic acid

In the title compound, C13H8Cl3NO4S, the aromatic rings are oriented at a dihedral angle of 68.94 (1)° and the mol-ecule adopts a V-shape. An intra-molecular N-H⋯O inter-action generates a six-membered S(6) ring motif. In the crystal, pairs of O-H⋯O hydrogen bonds involving the carb-oxy group link the mol-ecules into inversion dimers with an R 2 (2)(8) motif. N-H⋯O and non-classical C-H⋯O inter-actions connect the mol-ecules, forming sheets propagating in (100).

N-[Amino-(azido)-meth-ylidene]-4-methyl-benzene-sulfonamide

In the title mol-ecule, C(8)H(10)N(5)O(2)S, the amino-(azido)-methyl and p-toluene-sulfonyl moieties are inclined almost at right angles with respect to each other, making a dihedral angle of 83.49 (6)°. An intra-molecular N-H⋯O hydrogen bond gives rise to the formation of six-membered ring with graph-set motif S(6). In the crystal, inter-molecular N-H⋯O hydrogen bonding is responsible for the formation of dimers about inversion centers, which are linked through another N-H⋯O inter-action along the b axis.

2-Chloro-4-(2-iodo-benzene-sulfonamido)-benzoic acid

In the title compound, C(13)H(9)ClINO(4)S, the dihedral angle between the aromatic rings is 81.04 (17)°. The disposition of the I and Cl atoms attached to the two rings is anti. In the crystal, mol-ecules are connected via O-H⋯O and N-H⋯O hydrogen bonds.

5-Benzene-sulfonamido-2-chloro-benzoic acid

In the title compound, C(13)H(10)ClNO(4)S, the dihedral angle between the aromatic ring planes is 87.07 (6)° and an intra-molecular C-H⋯O inter-action occurs. In the crystal, inversion dimers linked by two O-H⋯O hydrogen bonds arise from the carboxyl groups. N-H⋯O hydrogen bonds link the dimers into chains and short C-Cl⋯π and S-O⋯π contacts are also seen.