Poly[μ-aqua-bis­(μ₅-2,4-di­chloro­benzoato)dipotassium]

In the title compound, [K₂(C₇H₃Cl₂O₂)₂(H₂O)]_n, the potassium salt of 2,4-di­chloro­benzoic acid, the repeating unit in the polymeric structure consists of two identical irregular KO₆Cl units related by twofold rotational symmetry, linked by a bridging water mol­ecule lying on the twofold axis. The coordination polyhedron about the K⁺ ion comprises a carboxyl­ate O atom and a Cl-atom donor from a bidentate chelate ligand inter­action, four O-atom donors from a doubly bridging bidentate carboxyl­ate O,O′-chelate inter­action and the water mol­ecule. A two-dimensional polymeric structure lying parallel to (100) is generated through a series of conjoined cyclic bridges between K⁺ ions and is stabilized by water–carboxyl­ate O—H...O hydrogen-bonding inter­actions.

4-(4-Amino­phenyl­sulfon­yl)anilinium toluene-4-sulfonate

In the title p-toluene­sulfonate salt of the drug dapsone, C₁₂H₁₃N₂O₂S⁺·C₇H₇O₃S⁻, the dihedral angle between the two aromatic rings of the dapsone monocation is 70.19 (17)° and those between these rings and that of the p-toluene­sulfonate anion are 72.34 (17) and 46.43 (17)°. All amine and aminium H atoms are involved in inter­molecular N—H...O hydrogen-bonding associations with sulfonyl O-atom acceptors as well as one of the sulfone O atoms, giving a three-dimensional structure.