CoC4H2O3 crystallizes in the triclinic P1 space group. There are six inequivalent Co sites. In the first Co site, Co(1) is bonded to one H(1,5); one O(1); one O(13); one O(14); one O(3); and one O(8) atom to form edge-sharing CoHO5 octahedra. The Co(1)-H(1,5) bond length is 1.44 Å. The Co(1)-O(1) bond length is 1.86 Å. The Co(1)-O(13) bond length is 1.90 Å. The Co(1)-O(14) bond length is 1.97 Å. The Co(1)-O(3) bond length is 2.06 Å. The Co(1)-O(8) bond length is 1.92 Å. In the second Co site, Co(2) is bonded to one H(2), one O(1), one O(14), one O(15), one O(2), and one O(9) atom to form edge-sharing CoHO5 octahedra. The Co(2)-H(2) bond length is 1.44 Å. The Co(2)-O(1) bond length is 2.05 Å. The Co(2)-O(14) bond length is 1.90 Å. The Co(2)-O(15) bond length is 1.97 Å. The Co(2)-O(2) bond length is 1.86 Å. The Co(2)-O(9) bond length is 1.92 Å. In the third Co site, Co(3) is bonded to one H(3), one O(13), one O(15), one O(2), one O(3), and one O(7) atom to form edge-sharing CoHO5 octahedra. The Co(3)-H(3) bond length is 1.44 Å. The Co(3)-O(13) bond length is 1.97 Å. The Co(3)-O(15) bond length is 1.90 Å. The Co(3)-O(2) bond length is 2.05 Å. The Co(3)-O(3) bond length is 1.86 Å. The Co(3)-O(7) bond length is 1.92 Å. In the fourth Co site, Co(4) is bonded to one H(4), one O(11), one O(16), one O(17), one O(4), and one O(6) atom to form edge-sharing CoHO5 octahedra. The Co(4)-H(4) bond length is 1.44 Å. The Co(4)-O(11) bond length is 1.92 Å. The Co(4)-O(16) bond length is 1.90 Å. The Co(4)-O(17) bond length is 1.97 Å. The Co(4)-O(4) bond length is 1.86 Å. The Co(4)-O(6) bond length is 2.06 Å. In the fifth Co site, Co(5) is bonded to one H(1,5); one O(12); one O(17); one O(18); one O(4); and one O(5) atom to form edge-sharing CoHO5 octahedra. The Co(5)-H(1,5) bond length is 1.44 Å. The Co(5)-O(12) bond length is 1.92 Å. The Co(5)-O(17) bond length is 1.90 Å. The Co(5)-O(18) bond length is 1.97 Å. The Co(5)-O(4) bond length is 2.05 Å. The Co(5)-O(5) bond length is 1.86 Å. In the sixth Co site, Co(6) is bonded to one H(6), one O(10), one O(16), one O(18), one O(5), and one O(6) atom to form edge-sharing CoHO5 octahedra. The Co(6)-H(6) bond length is 1.44 Å. The Co(6)-O(10) bond length is 1.92 Å. The Co(6)-O(16) bond length is 1.97 Å. The Co(6)-O(18) bond length is 1.90 Å. The Co(6)-O(5) bond length is 2.06 Å. The Co(6)-O(6) bond length is 1.86 Å. There are twenty-four inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(1), and one O(7) atom. The C(1)-C(7) bond length is 1.47 Å. The C(1)-O(1) bond length is 1.29 Å. The C(1)-O(7) bond length is 1.27 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(2), and one O(8) atom. The C(2)-C(8) bond length is 1.47 Å. The C(2)-O(2) bond length is 1.29 Å. The C(2)-O(8) bond length is 1.27 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(3), and one O(9) atom. The C(3)-C(9) bond length is 1.47 Å. The C(3)-O(3) bond length is 1.29 Å. The C(3)-O(9) bond length is 1.27 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(10), and one O(4) atom. The C(4)-C(10) bond length is 1.47 Å. The C(4)-O(10) bond length is 1.27 Å. The C(4)-O(4) bond length is 1.29 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(11), one O(11), and one O(5) atom. The C(5)-C(11) bond length is 1.47 Å. The C(5)-O(11) bond length is 1.27 Å. The C(5)-O(5) bond length is 1.29 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(12), one O(12), and one O(6) atom. The C(6)-C(12) bond length is 1.47 Å. The C(6)-O(12) bond length is 1.27 Å. The C(6)-O(6) bond length is 1.29 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(1), one C(13), and one C(22) atom. The C(7)-C(13) bond length is 1.43 Å. The C(7)-C(22) bond length is 1.40 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(14), one C(2), and one C(23) atom. The C(8)-C(14) bond length is 1.43 Å. The C(8)-C(23) bond length is 1.40 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(15), one C(24), and one C(3) atom. The C(9)-C(15) bond length is 1.43 Å. The C(9)-C(24) bond length is 1.40 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(16), one C(19), and one C(4) atom. The C(10)-C(16) bond length is 1.43 Å. The C(10)-C(19) bond length is 1.40 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(17), one C(20), and one C(5) atom. The C(11)-C(17) bond length is 1.43 Å. The C(11)-C(20) bond length is 1.40 Å. In the twelfth C site, C(12) is bonded in a trigonal planar geometry to one C(18), one C(21), and one C(6) atom. The C(12)-C(18) bond length is 1.43 Å. The C(12)-C(21) bond length is 1.40 Å. In the thirteenth C site, C(13) is bonded in a single-bond geometry to one C(19), one C(7), and one O(13) atom. The C(13)-C(19) bond length is 1.40 Å. The C(13)-O(13) bond length is 1.36 Å. In the fourteenth C site, C(14) is bonded in a single-bond geometry to one C(20), one C(8), and one O(14) atom. The C(14)-C(20) bond length is 1.40 Å. The C(14)-O(14) bond length is 1.36 Å. In the fifteenth C site, C(15) is bonded in a single-bond geometry to one C(21), one C(9), and one O(15) atom. The C(15)-C(21) bond length is 1.39 Å. The C(15)-O(15) bond length is 1.36 Å. In the sixteenth C site, C(16) is bonded in a single-bond geometry to one C(10), one C(22), and one O(16) atom. The C(16)-C(22) bond length is 1.40 Å. The C(16)-O(16) bond length is 1.36 Å. In the seventeenth C site, C(17) is bonded in a single-bond geometry to one C(11), one C(23), and one O(17) atom. The C(17)-C(23) bond length is 1.40 Å. The C(17)-O(17) bond length is 1.36 Å. In the eighteenth C site, C(18) is bonded in a single-bond geometry to one C(12), one C(24), and one O(18) atom. The C(18)-C(24) bond length is 1.39 Å. The C(18)-O(18) bond length is 1.36 Å. In the nineteenth C site, C(19) is bonded in a distorted trigonal planar geometry to one C(10), one C(13), and one H(7) atom. The C(19)-H(7) bond length is 1.09 Å. In the twentieth C site, C(20) is bonded in a distorted trigonal planar geometry to one C(11), one C(14), and one H(8) atom. The C(20)-H(8) bond length is 1.09 Å. In the twenty-first C site, C(21) is bonded in a distorted trigonal planar geometry to one C(12); one C(15); and one H(9,11,12) atom. The C(21)-H(9,11,12) bond length is 1.09 Å. In the twenty-second C site, C(22) is bonded in a distorted trigonal planar geometry to one C(16), one C(7), and one H(10) atom. The C(22)-H(10) bond length is 1.09 Å. In the twenty-third C site, C(23) is bonded in a distorted trigonal planar geometry to one C(17); one C(8); and one H(9,11,12) atom. The C(23)-H(9,11,12) bond length is 1.09 Å. In the twenty-fourth C site, C(24) is bonded in a distorted trigonal planar geometry to one C(18); one C(9); and one H(9,11,12) atom. The C(24)-H(9,11,12) bond length is 1.09 Å. There are nine inequivalent H sites. In the first H site, H(1,5) is bonded in a single-bond geometry to one Co(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Co(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one Co(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one Co(4) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one Co(6) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one C(19) atom. In the seventh H site, H(8) is bonded in a single-bond geometry to one C(20) atom. In the eighth H site, H(9,11,12) is bonded in a single-bond geometry to one C(21) atom. In the ninth H site, H(10) is bonded in a single-bond geometry to one C(22) atom. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one C(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one C(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Co(1), one Co(3), and one C(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Co(4), one Co(5), and one C(4) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Co(5), one Co(6), and one C(5) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Co(4), one Co(6), and one C(6) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(3) and one C(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(1) and one C(2) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Co(2) and one C(3) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Co(6) and one C(4) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Co(4) and one C(5) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Co(5) and one C(6) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(3), and one C(13) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one C(14) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one C(15) atom. In the sixteenth O site, O(16) is bonded in a distorted trigonal planar geometry to one Co(4), one Co(6), and one C(16) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Co(4), one Co(5), and one C(17) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal planar geometry to one Co(5), one Co(6), and one C(18) atom. Linkers: 3 [O]C(=O)c1cc([O])c(C([O])=O)cc1[O]. Metal clusters: 6 [Co]. The MOF has largest included sphere 10.77 A, density 1.27 g/cm3, surface area 2275.54 m2/g, accessible volume 0.51 cm3/g