CoH3(C3O2)3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(10), one O(14), one O(3), one O(5), and one O(7) atom to form corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles are 70°. The Co(1)-O(1) bond length is 2.08 Å. The Co(1)-O(10) bond length is 2.01 Å. The Co(1)-O(14) bond length is 2.10 Å. The Co(1)-O(3) bond length is 2.17 Å. The Co(1)-O(5) bond length is 2.06 Å. The Co(1)-O(7) bond length is 2.20 Å. In the second Co site, Co(2) is bonded in a 5-coordinate geometry to one O(11), one O(2), one O(3), one O(4), and one O(9) atom. The Co(2)-O(11) bond length is 2.14 Å. The Co(2)-O(2) bond length is 2.03 Å. The Co(2)-O(3) bond length is 2.09 Å. The Co(2)-O(4) bond length is 2.35 Å. The Co(2)-O(9) bond length is 2.04 Å. In the third Co site, Co(3) is bonded to one O(13), one O(15), one O(17), one O(6), one O(7), and one O(8) atom to form distorted corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles are 70°. The Co(3)-O(13) bond length is 2.00 Å. The Co(3)-O(15) bond length is 2.00 Å. The Co(3)-O(17) bond length is 2.53 Å. The Co(3)-O(6) bond length is 1.99 Å. The Co(3)-O(7) bond length is 2.04 Å. The Co(3)-O(8) bond length is 2.39 Å. There are twenty-seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(21), one O(1), and one O(2) atom. The C(1)-C(21) bond length is 1.51 Å. The C(1)-O(1) bond length is 1.25 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(2)-C(3) bond length is 1.51 Å. The C(2)-O(3) bond length is 1.29 Å. The C(2)-O(4) bond length is 1.24 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(26), and one C(4) atom. The C(3)-C(26) bond length is 1.38 Å. The C(3)-C(4) bond length is 1.41 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(1) atom. The C(4)-C(5) bond length is 1.38 Å. The C(4)-H(1) bond length is 0.94 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(24), one C(4), and one C(6) atom. The C(5)-C(24) bond length is 1.39 Å. The C(5)-C(6) bond length is 1.51 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(5), and one O(6) atom. The C(6)-O(5) bond length is 1.22 Å. The C(6)-O(6) bond length is 1.28 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(7), and one O(8) atom. The C(7)-C(8) bond length is 1.50 Å. The C(7)-O(7) bond length is 1.30 Å. The C(7)-O(8) bond length is 1.24 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(13), one C(7), and one C(9) atom. The C(8)-C(13) bond length is 1.40 Å. The C(8)-C(9) bond length is 1.41 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(10), one C(8), and one H(2) atom. The C(9)-C(10) bond length is 1.37 Å. The C(9)-H(2) bond length is 0.95 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(15), and one C(9) atom. The C(10)-C(11) bond length is 1.41 Å. The C(10)-C(15) bond length is 1.53 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(10), one C(12), and one H(3) atom. The C(11)-C(12) bond length is 1.40 Å. The C(11)-H(3) bond length is 0.94 Å. In the twelfth C site, C(12) is bonded in a trigonal planar geometry to one C(11), one C(13), and one C(14) atom. The C(12)-C(13) bond length is 1.37 Å. The C(12)-C(14) bond length is 1.51 Å. In the thirteenth C site, C(13) is bonded in a distorted single-bond geometry to one C(12), one C(8), and one H(4) atom. The C(13)-H(4) bond length is 0.93 Å. In the fourteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(12), one O(10), and one O(9) atom. The C(14)-O(10) bond length is 1.28 Å. The C(14)-O(9) bond length is 1.25 Å. In the fifteenth C site, C(15) is bonded in a distorted trigonal planar geometry to one C(10), one O(11), and one O(12) atom. The C(15)-O(11) bond length is 1.31 Å. The C(15)-O(12) bond length is 1.21 Å. In the sixteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one C(17), one O(13), and one O(14) atom. The C(16)-C(17) bond length is 1.48 Å. The C(16)-O(13) bond length is 1.27 Å. The C(16)-O(14) bond length is 1.25 Å. In the seventeenth C site, C(17) is bonded in a trigonal planar geometry to one C(16), one C(18), and one C(22) atom. The C(17)-C(18) bond length is 1.40 Å. The C(17)-C(22) bond length is 1.40 Å. In the eighteenth C site, C(18) is bonded in a distorted single-bond geometry to one C(17), one C(19), and one H(5) atom. The C(18)-C(19) bond length is 1.37 Å. The C(18)-H(5) bond length is 0.93 Å. In the nineteenth C site, C(19) is bonded in a trigonal planar geometry to one C(18), one C(20), and one C(23) atom. The C(19)-C(20) bond length is 1.41 Å. The C(19)-C(23) bond length is 1.52 Å. In the twentieth C site, C(20) is bonded in a distorted single-bond geometry to one C(19), one C(21), and one H(6) atom. The C(20)-C(21) bond length is 1.38 Å. The C(20)-H(6) bond length is 0.94 Å. In the twenty-first C site, C(21) is bonded in a trigonal planar geometry to one C(1), one C(20), and one C(22) atom. The C(21)-C(22) bond length is 1.40 Å. In the twenty-second C site, C(22) is bonded in a distorted single-bond geometry to one C(17), one C(21), and one H(7) atom. The C(22)-H(7) bond length is 0.94 Å. In the twenty-third C site, C(23) is bonded in a distorted bent 120 degrees geometry to one C(19), one O(15), and one O(16) atom. The C(23)-O(15) bond length is 1.25 Å. The C(23)-O(16) bond length is 1.26 Å. In the twenty-fourth C site, C(24) is bonded in a distorted single-bond geometry to one C(25), one C(5), and one H(8) atom. The C(24)-C(25) bond length is 1.39 Å. The C(24)-H(8) bond length is 0.93 Å. In the twenty-fifth C site, C(25) is bonded in a trigonal planar geometry to one C(24), one C(26), and one C(27) atom. The C(25)-C(26) bond length is 1.40 Å. The C(25)-C(27) bond length is 1.49 Å. In the twenty-sixth C site, C(26) is bonded in a distorted single-bond geometry to one C(25), one C(3), and one H(9) atom. The C(26)-H(9) bond length is 0.94 Å. In the twenty-seventh C site, C(27) is bonded in a distorted bent 120 degrees geometry to one C(25), one O(17), and one O(18) atom. The C(27)-O(17) bond length is 1.33 Å. The C(27)-O(18) bond length is 1.21 Å. There are nine inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(9) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(11) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(13) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(18) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(20) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(22) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(24) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(26) atom. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Co(2) and one C(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one C(2) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Co(2) and one C(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Co(1) and one C(6) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(3) and one C(6) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one Co(3), and one C(7) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Co(3) and one C(7) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one C(14) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Co(1) and one C(14) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Co(2) and one C(15) atom. In the twelfth O site, O(12) is bonded in a single-bond geometry to one C(15) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one Co(3) and one C(16) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one C(16) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one Co(3) and one C(23) atom. In the sixteenth O site, O(16) is bonded in a single-bond geometry to one C(23) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 120 degrees geometry to one Co(3) and one C(27) atom. In the eighteenth O site, O(18) is bonded in a single-bond geometry to one C(27) atom. Linkers: 12 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 4 O=[C]O[Co]1(O[C]=O)O[C]O[Co]2(O[C]O1)O[C]O[Co]1(O[C]=O)(O[C]O2)O[C]O1. The MOF has largest included sphere 7.76 A, density 1.02 g/cm3, surface area 3273.29 m2/g, accessible volume 0.62 cm3/g