Abstract
In the crystal structure of the title compound, K+center dot C6H4IO3S- center dot-H2O, the potasium cation is 2.693 (3)-2.933 (3) angstrom from the sulfonate and water O atoms (including symmetry-related atoms) and forms a two-dimensional sheet-like structure in the bc plane, with the iodobenzene rings protruding above and below. The water molecule of crystallization is hydrogen-bonded to sulfonate O atoms within this two- dimensional arrangement. Symmetry-related iodobenzene rings are arranged perpendicular to one another with the I atom ca 4.1 angstrom from the centroid of the neighbouring benzene ring. In the crystal structure, these two- dimensional sheet-like supra-molecular structures are arranged parallel to one another, stacked along the a-axis direction, with the benzene rings interdigitated.