Acta Cryst. (2014). E70, m23 [ doi:10.1107/S1600536813033503 ]
Abstract: 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-HO hydrogen-bonding interactions.
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