Co5C50H26(N2O9)2(CH)10 crystallizes in the orthorhombic Pbca space group. The structure consists of forty 02329_fluka molecules inside a Co5C50H26(N2O9)2 framework. In the Co5C50H26(N2O9)2 framework, there are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(4), one O(5), one O(8), and one O(9) atom to form CoO5 square pyramids that share  a cornercorner with one Co(2)NO4 square pyramid and  an edgeedge with one Co(3)O6 octahedra. The Co(1)-O(1) bond length is 2.02 Å. The Co(1)-O(4) bond length is 2.28 Å. The Co(1)-O(5) bond length is 2.01 Å. The Co(1)-O(8) bond length is 2.12 Å. The Co(1)-O(9) bond length is 2.12 Å. In the second Co site, Co(2) is bonded to one N(1), one O(1), one O(2), one O(3), and one O(7) atom to form CoNO4 square pyramids that share  a cornercorner with one Co(1)O5 square pyramid and  an edgeedge with one Co(3)O6 octahedra. The Co(2)-N(1) bond length is 2.13 Å. The Co(2)-O(1) bond length is 2.06 Å. The Co(2)-O(2) bond length is 2.18 Å. The Co(2)-O(3) bond length is 2.15 Å. The Co(2)-O(7) bond length is 2.07 Å. In the third Co site, Co(3) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form CoO6 octahedra that share edges with two equivalent Co(2)NO4 square pyramids and edges with two equivalent Co(1)O5 square pyramids. Both Co(3)-O(1) bond lengths are 1.99 Å. Both Co(3)-O(2) bond lengths are 2.23 Å. Both Co(3)-O(4) bond lengths are 2.13 Å. There are twenty-five inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(13) atom. The C(1)-N(1) bond length is 1.35 Å. The C(1)-H(13) bond length is 0.93 Å. In the second C site, C(3) is bonded in a distorted single-bond geometry to one C(23) and one H(18) atom. The C(3)-C(23) bond length is 1.37 Å. The C(3)-H(18) bond length is 0.93 Å. In the third C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(25), one N(2), and one H(10) atom. The C(5)-C(25) bond length is 1.46 Å. The C(5)-N(2) bond length is 1.26 Å. The C(5)-H(10) bond length is 0.93 Å. In the fourth C site, C(6) is bonded in a distorted single-bond geometry to one C(22) and one H(15) atom. The C(6)-C(22) bond length is 1.42 Å. The C(6)-H(15) bond length is 0.93 Å. In the fifth C site, C(7) is bonded in a trigonal planar geometry to one C(13), one C(15), and one C(18) atom. The C(7)-C(13) bond length is 1.43 Å. The C(7)-C(15) bond length is 1.37 Å. The C(7)-C(18) bond length is 1.51 Å. In the sixth C site, C(9) is bonded in a distorted single-bond geometry to one C(30) and one H(9) atom. The C(9)-C(30) bond length is 1.36 Å. The C(9)-H(9) bond length is 0.93 Å. In the seventh C site, C(10) is bonded in a trigonal planar geometry to one C(13), one C(24), and one C(30) atom. The C(10)-C(13) bond length is 1.43 Å. The C(10)-C(24) bond length is 1.43 Å. The C(10)-C(30) bond length is 1.42 Å. In the eighth C site, C(11) is bonded in a trigonal planar geometry to one C(14), one C(22), and one C(23) atom. The C(11)-C(14) bond length is 1.42 Å. The C(11)-C(22) bond length is 1.43 Å. The C(11)-C(23) bond length is 1.44 Å. In the ninth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(30), one O(6), and one O(8) atom. The C(12)-C(30) bond length is 1.52 Å. The C(12)-O(6) bond length is 1.24 Å. The C(12)-O(8) bond length is 1.27 Å. In the tenth C site, C(13) is bonded in a trigonal planar geometry to one C(10), one C(29), and one C(7) atom. The C(13)-C(29) bond length is 1.41 Å. In the eleventh C site, C(14) is bonded in a distorted single-bond geometry to one C(11) and one H(4) atom. The C(14)-H(4) bond length is 0.93 Å. In the twelfth C site, C(15) is bonded in a single-bond geometry to one C(7) and one H(6) atom. The C(15)-H(6) bond length is 0.93 Å. In the thirteenth C site, C(16) is bonded in a single-bond geometry to one C(26) and one H(17) atom. The C(16)-C(26) bond length is 1.37 Å. The C(16)-H(17) bond length is 0.93 Å. In the fourteenth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one C(23), one O(3), and one O(4) atom. The C(17)-C(23) bond length is 1.52 Å. The C(17)-O(3) bond length is 1.26 Å. The C(17)-O(4) bond length is 1.27 Å. In the fifteenth C site, C(18) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(5), and one O(7) atom. The C(18)-O(5) bond length is 1.25 Å. The C(18)-O(7) bond length is 1.24 Å. In the sixteenth C site, C(19) is bonded in a distorted single-bond geometry to one C(25) and one H(2) atom. The C(19)-C(25) bond length is 1.39 Å. The C(19)-H(2) bond length is 0.93 Å. In the seventeenth C site, C(20) is bonded in a distorted bent 120 degrees geometry to one C(25), one N(1), and one H(11) atom. The C(20)-C(25) bond length is 1.40 Å. The C(20)-N(1) bond length is 1.32 Å. The C(20)-H(11) bond length is 0.93 Å. In the eighteenth C site, C(22) is bonded in a trigonal planar geometry to one C(11), one C(26), and one C(6) atom. The C(22)-C(26) bond length is 1.44 Å. In the nineteenth C site, C(23) is bonded in a trigonal planar geometry to one C(11), one C(17), and one C(3) atom. In the twentieth C site, C(24) is bonded in a distorted single-bond geometry to one C(10) and one H(8) atom. The C(24)-H(8) bond length is 0.93 Å. In the twenty-first C site, C(25) is bonded in a trigonal planar geometry to one C(19), one C(20), and one C(5) atom. In the twenty-second C site, C(26) is bonded in a trigonal planar geometry to one C(16), one C(22), and one C(28) atom. The C(26)-C(28) bond length is 1.51 Å. In the twenty-third C site, C(28) is bonded in a distorted bent 120 degrees geometry to one C(26), one O(2), and one O(9) atom. The C(28)-O(2) bond length is 1.27 Å. The C(28)-O(9) bond length is 1.25 Å. In the twenty-fourth C site, C(29) is bonded in a distorted single-bond geometry to one C(13) and one H(7) atom. The C(29)-H(7) bond length is 0.93 Å. In the twenty-fifth C site, C(30) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(9) atom. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Co(2), one C(1), and one C(20) atom. In the second N site, N(2) is bonded in a distorted bent 120 degrees geometry to one C(5) and one N(2) atom. The N(2)-N(2) bond length is 1.42 Å. There are thirteen inequivalent H sites. In the first H site, H(2) is bonded in a single-bond geometry to one C(19) atom. In the second H site, H(4) is bonded in a single-bond geometry to one C(14) atom. In the third H site, H(6) is bonded in a single-bond geometry to one C(15) atom. In the fourth H site, H(7) is bonded in a single-bond geometry to one C(29) atom. In the fifth H site, H(8) is bonded in a single-bond geometry to one C(24) atom. In the sixth H site, H(9) is bonded in a single-bond geometry to one C(9) atom. In the seventh H site, H(10) is bonded in a single-bond geometry to one C(5) atom. In the eighth H site, H(11) is bonded in a single-bond geometry to one C(20) atom. In the ninth H site, H(12) is bonded in a single-bond geometry to one O(1) atom. The H(12)-O(1) bond length is 0.98 Å. In the tenth H site, H(13) is bonded in a single-bond geometry to one C(1) atom. In the eleventh H site, H(15) is bonded in a single-bond geometry to one C(6) atom. In the twelfth H site, H(17) is bonded in a single-bond geometry to one C(16) atom. In the thirteenth H site, H(18) is bonded in a single-bond geometry to one C(3) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Co(1), one Co(2), one Co(3), and one H(12) 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(28) atom. In the third O site, O(4) is bonded in a 3-coordinate geometry to one Co(1), one Co(3), and one C(17) atom. In the fourth O site, O(6) is bonded in a single-bond geometry to one C(12) atom. In the fifth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one C(18) atom. In the sixth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(1) and one C(12) atom. In the seventh O site, O(9) is bonded in a 2-coordinate geometry to one Co(1) and one C(28) atom. In the eighth O site, O(3) is bonded in a distorted single-bond geometry to one Co(2) and one C(17) atom. In the ninth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one C(18) atom. Linkers: 4 [CH]([N][N][CH]c1cccnc1)c1cccnc1 ,16 [O]C(=O)c1ccc(C([O])=O)c2ccccc12. Metal clusters: 4 O=[C]O[Co]1O[C]O[Co]2O[C]O[Co](O[C]=O)O[C]O[Co](O[C]O1)O[C]O[Co](O)(O)O[C]O2. RCSR code: bcu. The MOF has largest included sphere 4.73 A, density 1.35 g/cm3, surface area 3808.40 m2/g, accessible volume 0.33 cm3/g