CoH8(CO2)4 is Indium-like structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four CoH8(CO2)4 clusters. Co(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. Both Co(1)-O(1) bond lengths are 2.08 Å. Both Co(1)-O(3) bond lengths are 2.13 Å. Both Co(1)-O(4) bond lengths are 2.05 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one O(1) atom. The C(1)-O(1) bond length is 1.26 Å. In the second C site, C(2) is bonded in a single-bond geometry to one O(2) atom. The C(2)-O(2) bond length is 1.27 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(2) and one O(3) atom. The H(1)-O(2) bond length is 1.66 Å. The H(1)-O(3) bond length is 1.00 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(3) atom. The H(2)-O(3) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(4) atom. The H(3)-O(4) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(4) atom. The H(4)-O(4) bond length is 0.99 Å. There are four inequivalent O sites. In the first O site, O(4) is bonded in a distorted water-like geometry to one Co(1), one H(3), and one H(4) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Co(1) and one C(1) atom. In the third O site, O(2) is bonded in a 1-coordinate geometry to one C(2) and one H(1) atom. In the fourth O site, O(3) is bonded in a distorted water-like geometry to one Co(1), one H(1), and one H(2) atom. Linkers: 2 O=C1C(=O)C(=O)C1=O. Metal clusters: 2 O.O.O.O.[O][Co][O]. The MOF has largest included sphere 2.40 A, density 2.05 g/cm3, surface area 3306.92 m2/g, accessible volume 0.11 cm3/g