CoC4HO3(CH2)2 crystallizes in the triclinic P-1 space group. The structure consists of twelve 02329_fluka molecules inside a CoC4HO3 framework. In the CoC4HO3 framework, there are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(3), one O(4), one O(5), and one O(9) atom to form distorted edge-sharing CoO5 square pyramids. The Co(1)-O(2) bond length is 2.04 Å. The Co(1)-O(3) bond length is 1.99 Å. The Co(1)-O(4) bond length is 2.07 Å. The Co(1)-O(5) bond length is 2.14 Å. The Co(1)-O(9) bond length is 2.08 Å. In the second Co site, Co(2) is bonded to one O(1), one O(3), one O(5), one O(6), and one O(7) atom to form distorted edge-sharing CoO5 square pyramids. The Co(2)-O(1) bond length is 1.99 Å. The Co(2)-O(3) bond length is 2.04 Å. The Co(2)-O(5) bond length is 2.08 Å. The Co(2)-O(6) bond length is 2.14 Å. The Co(2)-O(7) bond length is 2.08 Å. In the third Co site, Co(3) is bonded to one O(1), one O(2), one O(4), one O(6), and one O(8) atom to form distorted edge-sharing CoO5 square pyramids. The Co(3)-O(1) bond length is 2.04 Å. The Co(3)-O(2) bond length is 1.98 Å. The Co(3)-O(4) bond length is 2.14 Å. The Co(3)-O(6) bond length is 2.07 Å. The Co(3)-O(8) bond length is 2.08 Å. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(4), one C(7), and one O(1) atom. The C(1)-C(4) bond length is 1.43 Å. The C(1)-C(7) bond length is 1.40 Å. The C(1)-O(1) bond length is 1.34 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(5); one C(8,9); and one O(2) atom. The C(2)-C(5) bond length is 1.43 Å. The C(2)-C(8,9) bond length is 1.40 Å. The C(2)-O(2) bond length is 1.34 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(6); one C(8,9); and one O(3) atom. The C(3)-C(6) bond length is 1.43 Å. The C(3)-C(8,9) bond length is 1.40 Å. The C(3)-O(3) bond length is 1.34 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(1), one C(10), and one C(7) atom. The C(4)-C(10) bond length is 1.49 Å. The C(4)-C(7) bond length is 1.40 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(11); one C(2); and one C(8,9) atom. The C(5)-C(11) bond length is 1.49 Å. The C(5)-C(8,9) bond length is 1.40 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(12); one C(3); and one C(8,9) atom. The C(6)-C(12) bond length is 1.49 Å. The C(6)-C(8,9) bond length is 1.40 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(1), one C(4), and one H(1) atom. The C(7)-H(1) bond length is 1.09 Å. In the eighth C site, C(8,9) is bonded in a distorted trigonal planar geometry to one C(2); one C(5); and one H(2,3) atom. The C(8,9)-H(2,3) bond length is 1.09 Å. In the ninth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(4), and one O(7) atom. The C(10)-O(4) bond length is 1.29 Å. The C(10)-O(7) bond length is 1.27 Å. In the tenth C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(5), and one O(8) atom. The C(11)-O(5) bond length is 1.29 Å. The C(11)-O(8) bond length is 1.27 Å. In the eleventh C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(6), and one O(9) atom. The C(12)-O(6) bond length is 1.29 Å. The C(12)-O(9) bond length is 1.27 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(7) atom. In the second H site, H(2,3) is bonded in a single-bond geometry to one C(8,9) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(2), one Co(3), and one C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(3), and one C(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one C(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Co(1), one Co(3), and one C(10) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one C(11) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one C(12) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(2) and one C(10) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(3) and one C(11) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Co(1) and one C(12) atom. Linkers: 3 [O]C(=O)c1cc([O])c(C([O])=O)cc1[O]. Metal clusters: 6 [Co]. The MOF has largest included sphere 7.96 A, density 1.36 g/cm3, surface area 2818.17 m2/g, accessible volume 0.38 cm3/g