CrH2(C3O2)2 crystallizes in the cubic Fm-3m space group. Cr(1) is bonded in a square pyramidal geometry to one Cr(1) and four equivalent O(1) atoms. The Cr(1)-Cr(1) bond length is 1.86 Å. All Cr(1)-O(1) bond lengths are 1.96 Å. There are three inequivalent C sites. In the first C site, C(3) is bonded in a distorted single-bond geometry to two equivalent C(2) and one H(1) atom. Both C(3)-C(2) bond lengths are 1.40 Å. The C(3)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1) and two equivalent C(3) atoms. The C(2)-C(1) bond length is 1.48 Å. In the third C site, C(1) is bonded in a bent 120 degrees geometry to one C(2) and two equivalent O(1) atoms. Both C(1)-O(1) bond lengths are 1.29 Å. H(1) is bonded in a single-bond geometry to one C(3) atom. O(1) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one C(1) atom. Linkers: 8 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 6 [C]1O[Cr]234O[C]O[Cr]2(O1)(O[C]O3)O[C]O4. RCSR code: tbo. The MOF has largest included sphere 12.99 A, density 0.80 g/cm3, surface area 3354.12 m2/g, accessible volume 0.87 cm3/g