Co2C35N3H16O11 crystallizes in the tetragonal I-42d space group. Co(1) is bonded to one N(1), one O(1), one O(2), one O(3), one O(4), and one O(6) atom to form corner-sharing CoNO5 octahedra. The corner-sharing octahedral tilt angles are 69°. The Co(1)-N(1) bond length is 2.13 Å. The Co(1)-O(1) bond length is 2.12 Å. The Co(1)-O(2) bond length is 2.20 Å. The Co(1)-O(3) bond length is 1.98 Å. The Co(1)-O(4) bond length is 2.00 Å. The Co(1)-O(6) bond length is 2.18 Å. There are eighteen inequivalent C sites. In the first C site, C(18) is bonded in a single-bond geometry to one N(2) atom. The C(18)-N(2) bond length is 1.43 Å. In the second C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(8)-C(1) bond length is 1.47 Å. The C(8)-O(1) bond length is 1.29 Å. The C(8)-O(2) bond length is 1.27 Å. In the third C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(9)-C(4) bond length is 1.49 Å. The C(9)-O(3) bond length is 1.22 Å. The C(9)-O(4) bond length is 1.28 Å. In the fourth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(11), one N(1), and one H(4) atom. The C(10)-C(11) bond length is 1.39 Å. The C(10)-N(1) bond length is 1.39 Å. The C(10)-H(4) bond length is 0.95 Å. In the fifth C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(4), and one H(1) atom. The C(3)-C(1) bond length is 1.36 Å. The C(3)-C(4) bond length is 1.42 Å. The C(3)-H(1) bond length is 0.95 Å. In the sixth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(9) atom. The C(4)-C(5) bond length is 1.41 Å. In the seventh C site, C(5) is bonded in a distorted single-bond geometry to one C(4), one C(6), and one H(2) atom. The C(5)-C(6) bond length is 1.36 Å. The C(5)-H(2) bond length is 0.95 Å. In the eighth C site, C(6) is bonded in a trigonal planar geometry to one C(2), one C(5), and one C(7) atom. The C(6)-C(2) bond length is 1.46 Å. The C(6)-C(7) bond length is 1.38 Å. In the ninth C site, C(7) is bonded in a distorted single-bond geometry to one C(1), one C(6), and one H(3) atom. The C(7)-C(1) bond length is 1.38 Å. The C(7)-H(3) bond length is 0.95 Å. In the tenth C site, C(11) is bonded in a distorted trigonal planar geometry to one C(10), one C(12), and one H(5) atom. The C(11)-C(12) bond length is 1.39 Å. The C(11)-H(5) bond length is 0.95 Å. In the eleventh C site, C(12) is bonded in a distorted single-bond geometry to one C(11) and one H(6) atom. The C(12)-H(6) bond length is 0.95 Å. In the twelfth C site, C(13) is bonded in a distorted single-bond geometry to one C(14) and one H(7) atom. The C(13)-C(14) bond length is 1.39 Å. The C(13)-H(7) bond length is 0.95 Å. In the thirteenth C site, C(14) is bonded in a 3-coordinate geometry to one C(13), one N(1), and one H(8) atom. The C(14)-N(1) bond length is 1.39 Å. The C(14)-H(8) bond length is 0.95 Å. In the fourteenth C site, C(15) is bonded in a 5-coordinate geometry to one C(15), one C(16), one C(17), one N(2), and one O(6) atom. The C(15)-C(15) bond length is 1.26 Å. The C(15)-C(16) bond length is 1.53 Å. The C(15)-C(17) bond length is 1.33 Å. The C(15)-N(2) bond length is 1.41 Å. The C(15)-O(6) bond length is 1.20 Å. In the fifteenth C site, C(16) is bonded in a 2-coordinate geometry to one C(15) and one C(17) atom. The C(16)-C(17) bond length is 0.97 Å. In the sixteenth C site, C(17) is bonded in a 3-coordinate geometry to one C(15), one C(16), and one N(2) atom. The C(17)-N(2) bond length is 1.45 Å. In the seventeenth C site, C(1) is bonded in a trigonal planar geometry to one C(3), one C(7), and one C(8) atom. In the eighteenth C site, C(2) is bonded in a distorted trigonal planar geometry to one C(2), one C(6), and one O(5) atom. The C(2)-C(2) bond length is 1.21 Å. The C(2)-O(5) bond length is 1.47 Å. 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(10), and one C(14) atom. In the second N site, N(2) is bonded in a 5-coordinate geometry to one C(18), two equivalent C(15), and two equivalent C(17) atoms. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(10) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(11) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(12) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(13) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(14) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in an L-shaped geometry to one Co(1) and one C(8) atom. In the second O site, O(2) is bonded in an L-shaped geometry to one Co(1) and one C(8) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(1) and one C(9) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Co(1) and one C(9) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one C(2) atom. In the sixth O site, O(6) is bonded in a distorted tetrahedral geometry to two equivalent Co(1) and two equivalent C(15) atoms. Linkers: 8 [O][C]([C]([O])c1cc(C([O])=O)cc(C([O])=O)c1)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 16 [Co]. The MOF has largest included sphere 6.36 A, density 1.08 g/cm3, surface area 4178.23 m2/g, accessible volume 0.46 cm3/g