Experimental

R factor = 0.069; wR factor = 0.135; data-to-parameter ratio = 15.7. In the title compound, [K2(C8H6N3O2)2(H2O)]n, each K + ion is seven-coordinated by one O atom from a bridging water molecule, five carboxylate O atoms and one N atom from a benzotriazole group, forming a distorted mono-capped octa-hedral geometry. In the crystal, the carboxylate groups act as bridging ligands, forming a two-dimensional polymer parallel to (001). The aqua ligand, which lies on a twofold rotation axis, forms intermolecular O—H O hydrogen bonds within these layers