Co5C16H6O17 crystallizes in the cubic Fm-3m space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2) and four equivalent O(3) atoms to form corner-sharing CoO5 square pyramids. The Co(1)-O(2) bond length is 2.18 Å. All Co(1)-O(3) bond lengths are 2.02 Å. In the second Co site, Co(2) is bonded to one O(2), two equivalent O(1), and two equivalent O(4) atoms to form a mixture of distorted edge and corner-sharing CoO5 square pyramids. The Co(2)-O(2) bond length is 1.99 Å. Both Co(2)-O(1) bond lengths are 2.01 Å. Both Co(2)-O(4) bond lengths are 1.90 Å. There are five inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(4) atom. The C(1)-C(2) bond length is 1.35 Å. The C(1)-C(3) bond length is 1.53 Å. The C(1)-C(4) bond length is 1.40 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one H(1) atom. The C(2)-C(5) bond length is 1.36 Å. The C(2)-H(1) bond length is 0.95 Å. In the third C site, C(3) is bonded in a 3-coordinate geometry to one C(1), one O(3), and two equivalent O(1) atoms. The C(3)-O(3) bond length is 1.27 Å. Both C(3)-O(1) bond lengths are 1.29 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to two equivalent C(1) and one H(2) atom. The C(4)-H(2) bond length is 0.95 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(5) and two equivalent C(2) atoms. The C(5)-C(5) bond length is 1.55 Å. There are two inequivalent H sites. In the first H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the second H site, H(1) is bonded in a single-bond geometry to one C(2) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Co(2), one C(3), and one O(1) atom. The O(1)-O(1) bond length is 1.02 Å. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Co(1) and four equivalent Co(2) atoms. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(3) atom. In the fourth O site, O(4) is bonded in a distorted L-shaped geometry to two equivalent Co(2) atoms. Linkers: 24 [O]C1(c2cc(-c3cc(C4([O])OO4)cc(C4([O])OO4)c3)cc(C3([O])OO3)c2)OO1. Metal clusters: 120 [Co]. The MOF has largest included sphere 11.05 A, density 1.29 g/cm3, surface area 2584.70 m2/g, accessible volume 0.44 cm3/g