Co3H22(C15O8)2 crystallizes in the trigonal R-3 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(6), one O(7), and one O(8) atom. The Co(1)-O(2) bond length is 2.14 Å. The Co(1)-O(3) bond length is 1.97 Å. The Co(1)-O(4) bond length is 2.32 Å. The Co(1)-O(6) bond length is 1.97 Å. The Co(1)-O(7) bond length is 2.20 Å. The Co(1)-O(8) bond length is 2.06 Å. In the second Co site, Co(2) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(5), and two equivalent O(7) atoms. Both Co(2)-O(1) bond lengths are 2.07 Å. Both Co(2)-O(5) bond lengths are 2.05 Å. Both Co(2)-O(7) bond lengths are 2.10 Å. There are fifteen inequivalent C sites. In the first C site, C(7) is bonded in a trigonal planar geometry to one C(12), one C(4), and one C(8) atom. The C(7)-C(12) bond length is 1.40 Å. The C(7)-C(4) bond length is 1.48 Å. The C(7)-C(8) bond length is 1.40 Å. In the second C site, C(8) is bonded in a distorted single-bond geometry to one C(7), one C(9), and one H(5) atom. The C(8)-C(9) bond length is 1.40 Å. The C(8)-H(5) bond length is 1.09 Å. In the third C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(14), and one C(8) atom. The C(9)-C(10) bond length is 1.40 Å. The C(9)-C(14) bond length is 1.48 Å. In the fourth C site, C(10) is bonded in a distorted single-bond geometry to one C(11), one C(9), and one H(6) atom. The C(10)-C(11) bond length is 1.40 Å. The C(10)-H(6) bond length is 1.09 Å. In the fifth C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(15) atom. The C(11)-C(12) bond length is 1.40 Å. The C(11)-C(15) bond length is 1.50 Å. In the sixth C site, C(12) is bonded in a distorted single-bond geometry to one C(11), one C(7), and one H(7) atom. The C(12)-H(7) bond length is 1.09 Å. In the seventh C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(3) atom. The C(13)-C(1) bond length is 1.50 Å. The C(13)-O(1) bond length is 1.26 Å. The C(13)-O(3) bond length is 1.30 Å. In the eighth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(7), and one O(8) atom. The C(14)-O(7) bond length is 1.29 Å. The C(14)-O(8) bond length is 1.28 Å. In the ninth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(11), one O(5), and one O(6) atom. The C(15)-O(5) bond length is 1.26 Å. The C(15)-O(6) bond length is 1.29 Å. In the tenth C site, C(1) is bonded in a trigonal planar geometry to one C(13), one C(2), and one C(6) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(6) bond length is 1.40 Å. In the eleventh C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(1) atom. The C(2)-H(1) bond length is 1.09 Å. In the twelfth C site, C(3) is bonded in a distorted single-bond geometry to one C(4) and one H(2,3) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-H(2,3) bond length is 1.09 Å. In the thirteenth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(7) atom. The C(4)-C(5) bond length is 1.41 Å. In the fourteenth C site, C(5) is bonded in a distorted single-bond geometry to one C(4) and one H(2,3) atom. The C(5)-H(2,3) bond length is 1.09 Å. In the fifteenth C site, C(6) is bonded in a distorted single-bond geometry to one C(1) and one H(4) atom. The C(6)-H(4) bond length is 1.09 Å. There are ten inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2,3) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(8) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(10) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one C(12) atom. In the seventh H site, H(8) is bonded in a single-bond geometry to one O(2) atom. The H(8)-O(2) bond length is 0.97 Å. In the eighth H site, H(9) is bonded in a single-bond geometry to one O(2) atom. The H(9)-O(2) bond length is 0.98 Å. In the ninth H site, H(10) is bonded in a single-bond geometry to one O(4) atom. The H(10)-O(4) bond length is 0.98 Å. In the tenth H site, H(11) is bonded in a single-bond geometry to one O(4) atom. The H(11)-O(4) bond length is 0.97 Å. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one H(10), and one H(11) atom. In the second O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one C(15) atom. In the third O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(15) atom. In the fourth O site, O(7) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one C(14) atom. In the fifth O site, O(8) is bonded in an L-shaped geometry to one Co(1) and one C(14) atom. In the sixth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one C(13) atom. In the seventh O site, O(2) is bonded in a trigonal non-coplanar geometry to one Co(1), one H(8), and one H(9) atom. In the eighth O site, O(3) is bonded in a bent 120 degrees geometry to one Co(1) and one C(13) atom. Linkers: 6 [O]C(=O)c1ccc(-c2cc(C([O])=O)cc(C([O])=O)c2)cc1. Metal clusters: 3 O.O.O.O.[C]1O[Co]2O[C]O[Co]34(O1)(O[C]O2)O[C]O[Co](O[C]O3)O[C]O4. The MOF has largest included sphere 7.77 A, density 0.94 g/cm3, surface area 3971.61 m2/g, accessible volume 0.62 cm3/g