catena-Poly[[di­aqua­bis­(μ₃-5-carboxyl­ato-1H-pyrazole-3-carb­oxy­lic acid-κ³O³:O³;O⁵)dilithium(I)] monohydrate]

The basic structural unit of the title polymeric ribbon, {[Li₂(C₅H₃N₂O₂)₂(H₂O)₂]·H₂O}_n, is a centrosymmetric dinuclear complex in which the two Li^I ions are bridged by two carboxyl­ato O atoms, to generate a centrosymmetric Li₂O₂ core. These are connected into a chain along [01-1] by carboxylic acid–carbonyl-O bonds. The tetra­hedral coordination of the Li^I cation is completed by an aqua ligand. The carboxylic acid is involved in an intra-ribbon hydrogen bond. A solvate water molecule showing positional (50:50) disorder is observed. Polymeric ribbons along [01-1] are connected by O—H...O, N—H...O and O—H...N hydrogen bonds into a three-dimensional architecture.