metal-organic compounds
In the title compound, [Mn(C5H2N2O4)(H2O)2]n, the MnII ion has a distorted octahedral geometry and the 4-oxido-2-oxo-1,2-dihydropyrimidine-5-carboxylate (Hiso2−) anion acts as a μ3:η4-bridging ligand. Two oxo O atoms from different Hiso2− ligands bridge two MnII ions, forming centrosymmetric dinuclear building blocks. Each dinuclear building block interacts with another four by the coordination of the oxide groups and carboxylate O atoms, producing a two-dimensional framework in the ab plane. Hydrogen bonds further extend the two-dimensional sheets into a three-dimensional supramolecular framework.