Co2C28N4H26O9 crystallizes in the monoclinic C2/c space group. Co(1) is bonded to one N(1), one N(2), one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing CoN2O4 octahedra. The corner-sharing octahedral tilt angles are 65°. The Co(1)-N(1) bond length is 2.12 Å. The Co(1)-N(2) bond length is 2.08 Å. The Co(1)-O(2) bond length is 2.16 Å. The Co(1)-O(3) bond length is 2.11 Å. The Co(1)-O(4) bond length is 2.06 Å. The Co(1)-O(5) bond length is 2.13 Å. There are fourteen inequivalent C sites. In the first C site, C(5) is bonded in a distorted single-bond geometry to one C(1), one C(4), and one H(4) atom. The C(5)-C(1) bond length is 1.40 Å. The C(5)-C(4) bond length is 1.40 Å. The C(5)-H(4) bond length is 1.09 Å. In the second C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(6)-C(1) bond length is 1.50 Å. The C(6)-O(1) bond length is 1.27 Å. The C(6)-O(2) bond length is 1.28 Å. In the third C site, C(7) is bonded in a distorted trigonal non-coplanar geometry to one C(4), one H(5), one H(6), and one H(7) atom. The C(7)-C(4) bond length is 1.50 Å. The C(7)-H(5) bond length is 1.10 Å. The C(7)-H(6) bond length is 1.10 Å. The C(7)-H(7) bond length is 1.10 Å. In the fourth C site, C(8) is bonded in a trigonal planar geometry to one C(12), one C(13), and one C(9) atom. The C(8)-C(12) bond length is 1.40 Å. The C(8)-C(13) bond length is 1.50 Å. The C(8)-C(9) bond length is 1.40 Å. In the fifth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(8), one N(2), and one H(8) atom. The C(9)-N(2) bond length is 1.34 Å. The C(9)-H(8) bond length is 1.09 Å. In the sixth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(11), one N(2), and one H(9) atom. The C(10)-C(11) bond length is 1.40 Å. The C(10)-N(2) bond length is 1.34 Å. The C(10)-H(9) bond length is 1.09 Å. In the seventh C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(14) atom. The C(11)-C(12) bond length is 1.40 Å. The C(11)-C(14) bond length is 1.50 Å. In the eighth C site, C(12) is bonded in a distorted single-bond geometry to one C(11), one C(8), and one H(10) atom. The C(12)-H(10) bond length is 1.09 Å. In the ninth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(3), and one O(4) atom. The C(13)-O(3) bond length is 1.28 Å. The C(13)-O(4) bond length is 1.27 Å. In the tenth C site, C(14) is bonded in a distorted trigonal non-coplanar geometry to one C(11), one H(11), one H(12), and one H(13) atom. The C(14)-H(11) bond length is 1.10 Å. The C(14)-H(12) bond length is 1.09 Å. The C(14)-H(13) bond length is 1.10 Å. In the eleventh C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(5), and one C(6) atom. The C(1)-C(2) bond length is 1.39 Å. In the twelfth C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(1), one N(1), and one H(2) atom. The C(2)-N(1) bond length is 1.34 Å. The C(2)-H(2) bond length is 1.09 Å. In the thirteenth C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(4), one N(1), and one H(3) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-N(1) bond length is 1.35 Å. The C(3)-H(3) bond length is 1.09 Å. In the fourteenth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(7) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Co(1), one C(2), and one C(3) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Co(1), one C(10), and one C(9) atom. There are thirteen inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(1) and one O(5) atom. The H(1)-O(1) bond length is 1.49 Å. The H(1)-O(5) bond length is 1.04 Å. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(7) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(7) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(7) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(9) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(10) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(12) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(14) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(14) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(14) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a distorted water-like geometry to two equivalent Co(1) and two equivalent H(1) atoms. In the second O site, O(3) is bonded in a bent 120 degrees geometry to one Co(1) and one C(13) atom. In the third O site, O(1) is bonded in a water-like geometry to one C(6) and one H(1) atom. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to one Co(1) and one C(6) atom. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(13) atom. Linkers: 8 Cc1cncc(C([O])=O)c1. Metal clusters: 2 O.O=[C]O[Co]1O[C]O[Co](O[C]=O)O[C]O1. The MOF has largest included sphere 4.13 A, density 1.46 g/cm3, surface area 4214.67 m2/g, accessible volume 0.21 cm3/g