In the title coordination polymer, {(C4H14N2)[Mn2(C2O4)3]·6H2O}n, the MnII ions are octahedrally coordinated by the oxalate ligands to form a two-dimensional honeycomb-like network. This anionic framework incorporates the centrosymmetric butane-1,4-diammonium ions as counter-cations. The two-dimensional network is slightly distorted as a result of the vertically incorporated cations. Three kinds of water molecules are located in an interlayer space, forming hydrogen bonds with the ammonium cations and the oxalate ligands of the framework.
