Co2C15N5H13O11 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one N(1), one O(1), one O(11), one O(3), one O(5), and one O(7) atom to form corner-sharing CoNO5 octahedra. The corner-sharing octahedral tilt angles are 66°. The Co(1)-N(1) bond length is 2.09 Å. The Co(1)-O(1) bond length is 2.07 Å. The Co(1)-O(11) bond length is 2.13 Å. The Co(1)-O(3) bond length is 2.08 Å. The Co(1)-O(5) bond length is 2.09 Å. The Co(1)-O(7) bond length is 2.11 Å. In the second Co site, Co(2) is bonded to one N(3), one O(10), one O(11), one O(2), one O(8), and one O(9) atom to form corner-sharing CoNO5 octahedra. The corner-sharing octahedral tilt angles are 66°. The Co(2)-N(3) bond length is 2.17 Å. The Co(2)-O(10) bond length is 2.25 Å. The Co(2)-O(11) bond length is 2.12 Å. The Co(2)-O(2) bond length is 2.06 Å. The Co(2)-O(8) bond length is 2.02 Å. The Co(2)-O(9) bond length is 2.08 Å. There are fifteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one N(2) atom. The C(1)-C(3) bond length is 1.40 Å. The C(1)-N(1) bond length is 1.35 Å. The C(1)-N(2) bond length is 1.37 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(2), one N(3), and one H(1) atom. The C(2)-N(2) bond length is 1.36 Å. The C(2)-N(3) bond length is 1.33 Å. The C(2)-H(1) bond length is 1.08 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(4), and one N(3) atom. The C(3)-C(4) bond length is 1.42 Å. The C(3)-N(3) bond length is 1.40 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one N(4), and one N(5) atom. The C(4)-N(4) bond length is 1.33 Å. The C(4)-N(5) bond length is 1.36 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one N(1), one N(5), and one H(2) atom. The C(5)-N(1) bond length is 1.34 Å. The C(5)-N(5) bond length is 1.34 Å. The C(5)-H(2) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(1), and one O(2) atom. The C(6)-C(7) bond length is 1.50 Å. The C(6)-O(1) bond length is 1.26 Å. The C(6)-O(2) bond length is 1.30 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(12), one C(6), and one C(8) atom. The C(7)-C(12) bond length is 1.41 Å. The C(7)-C(8) bond length is 1.40 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(7), one C(9), and one H(3) atom. The C(8)-C(9) bond length is 1.40 Å. The C(8)-H(3) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(14), and one C(8) atom. The C(9)-C(10) bond length is 1.50 Å. The C(9)-C(14) bond length is 1.40 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(3), and one O(4) atom. The C(10)-O(3) bond length is 1.28 Å. The C(10)-O(4) bond length is 1.27 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(12), one C(14), and one H(4) atom. The C(11)-C(12) bond length is 1.40 Å. The C(11)-C(14) bond length is 1.40 Å. The C(11)-H(4) bond length is 1.09 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(7) atom. The C(12)-C(13) bond length is 1.51 Å. In the thirteenth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(12), one O(5), and one O(6) atom. The C(13)-O(5) bond length is 1.28 Å. The C(13)-O(6) bond length is 1.27 Å. In the fourteenth C site, C(14) is bonded in a trigonal planar geometry to one C(11), one C(15), and one C(9) atom. The C(14)-C(15) bond length is 1.50 Å. In the fifteenth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(14), one O(7), and one O(8) atom. The C(15)-O(7) bond length is 1.26 Å. The C(15)-O(8) bond length is 1.29 Å. There are five inequivalent N sites. In the first N site, N(3) is bonded in a trigonal planar geometry to one Co(2), one C(2), and one C(3) atom. In the second N site, N(4) is bonded in a trigonal planar geometry to one C(4), one H(6), and one H(7) atom. The N(4)-H(6) bond length is 1.01 Å. The N(4)-H(7) bond length is 1.04 Å. In the third N site, N(5) is bonded in a trigonal planar geometry to one C(4), one C(5), and one H(8) atom. The N(5)-H(8) bond length is 1.57 Å. In the fourth N site, N(1) is bonded in a trigonal planar geometry to one Co(1), one C(1), and one C(5) atom. In the fifth N site, N(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(2), and one H(5) atom. The N(2)-H(5) bond length is 1.02 Å. There are thirteen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) 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(8) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(11) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(2) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one N(4) atom. In the seventh H site, H(7) is bonded in a distorted single-bond geometry to one N(4) and one O(8) atom. The H(7)-O(8) bond length is 1.69 Å. In the eighth H site, H(8) is bonded in a linear geometry to one N(5) and one O(9) atom. The H(8)-O(9) bond length is 1.04 Å. In the ninth H site, H(9) is bonded in a single-bond geometry to one O(9) atom. The H(9)-O(9) bond length is 0.97 Å. In the tenth H site, H(10) is bonded in a single-bond geometry to one O(10) atom. The H(10)-O(10) bond length is 0.97 Å. In the eleventh H site, H(11) is bonded in a distorted single-bond geometry to one O(10) and one O(2) atom. The H(11)-O(10) bond length is 1.01 Å. The H(11)-O(2) bond length is 1.65 Å. In the twelfth H site, H(12) is bonded in a distorted single-bond geometry to one O(11) and one O(6) atom. The H(12)-O(11) bond length is 1.04 Å. The H(12)-O(6) bond length is 1.54 Å. In the thirteenth H site, H(13) is bonded in a distorted linear geometry to one O(11) and one O(4) atom. The H(13)-O(11) bond length is 1.04 Å. The H(13)-O(4) bond length is 1.52 Å. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one C(6) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Co(2), one C(6), and one H(11) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(1) and one C(10) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one C(10) and one H(13) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(1) and one C(13) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one C(13) and one H(12) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(1) and one C(15) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Co(2), one C(15), and one H(7) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Co(2), one H(8), and one H(9) atom. In the tenth O site, O(10) is bonded in a distorted water-like geometry to one Co(2), one H(10), and one H(11) atom. In the eleventh O site, O(11) is bonded in a distorted water-like geometry to one Co(1), one Co(2), one H(12), and one H(13) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)c(C([O])=O)cc1C([O])=O ,2 N[C]1N=C[N]c2[nH]cnc21 ,1 Nc1ncnc2[nH]cnc12. Metal clusters: 2 O.O.O.O=[C]O[Co]1(O[C]=O)O[C]O[Co]O[C]O1 ,4 [Co]. The MOF has largest included sphere 3.81 A, density 1.69 g/cm3, surface area 3259.31 m2/g, accessible volume 0.25 cm3/g