Na(CO2)4 is Indium-like structured and crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of two 71029-85-1 molecules. Na(1) is bonded in a distorted square co-planar geometry to four equivalent O(1) atoms. All Na(1)-O(1) bond lengths are 2.39 Å. C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.25 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a single-bond geometry to one C(1) atom. In the second O site, O(1) is bonded in a bent 150 degrees geometry to one Na(1) and one C(1) atom. Linkers: 4 [O]C(=O)C([O])=O. Metal clusters: 2 [Na]. RCSR code: sql. The MOF has largest included sphere 6.67 A, density 0.52 g/cm3, surface area 5363.45 m2/g, accessible volume 1.40 cm3/g