catena-Poly[[tetra­aqua-μ-aqua-bis­(μ₄-pyrimidine-2-carboxyl­ato)tetra­lithium] dichloride]

The asymmetric unit of the title compound, [Li₄(C₅H₃N₂O₂)₂(H₂O)₅]Cl₂, contains two Li^I cations, one with a distorted trigonal–bipyramidal and the other with a distorted tetra­hedral coordination geometry. Two symmetry-related asymmetric units constitute a building block of the structure, in which both ligand carboxyl­ate O atoms are bidentate and bridge the metal ions, forming a divalent cation. Charge balance is maintained by two chloride anions. The building blocks, bridged by Li^I cations, form cationic ribbons with chloride anions in the space between them. The ribbons propagate in [010] and are held together by a network of weak O—H...O hydrogen bonds which operate in the space between adjacent ribbons.