Co3C27N3H15O11 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one N(1), one O(1), one O(11), one O(8), and one O(9) atom to form CoNO4 square pyramids that share  a cornercorner with one Co(3)O4 tetrahedra and  a cornercorner with one Co(2)NO4 trigonal bipyramid. The Co(1)-N(1) bond length is 2.15 Å. The Co(1)-O(1) bond length is 2.06 Å. The Co(1)-O(11) bond length is 2.10 Å. The Co(1)-O(8) bond length is 2.08 Å. The Co(1)-O(9) bond length is 2.10 Å. In the second Co site, Co(2) is bonded to one N(3), one O(11), one O(2), one O(4), and one O(7) atom to form CoNO4 trigonal bipyramids that share  a cornercorner with one Co(1)NO4 square pyramid and  a cornercorner with one Co(3)O4 tetrahedra. The Co(2)-N(3) bond length is 2.09 Å. The Co(2)-O(11) bond length is 2.05 Å. The Co(2)-O(2) bond length is 2.05 Å. The Co(2)-O(4) bond length is 2.13 Å. The Co(2)-O(7) bond length is 2.03 Å. In the third Co site, Co(3) is bonded to one O(10), one O(11), one O(3), and one O(5) atom to form corner-sharing CoO4 tetrahedra. The Co(3)-O(10) bond length is 1.96 Å. The Co(3)-O(11) bond length is 1.97 Å. The Co(3)-O(3) bond length is 1.98 Å. The Co(3)-O(5) bond length is 1.97 Å. There are twenty-seven inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(27), and one C(6) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(27) bond length is 1.52 Å. The C(1)-C(6) bond length is 1.41 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(3) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-H(3) bond length is 0.93 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(7) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-C(7) bond length is 1.50 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(4) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(4) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(8) atom. The C(5)-C(6) bond length is 1.41 Å. The C(5)-C(8) bond length is 1.51 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(9) atom. The C(6)-C(9) bond length is 1.50 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(7)-O(3) bond length is 1.27 Å. The C(7)-O(4) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(5), and one O(6) atom. The C(8)-O(5) bond length is 1.27 Å. The C(8)-O(6) bond length is 1.25 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(6) atom. The C(9)-C(10) bond length is 1.40 Å. The C(9)-C(14) bond length is 1.38 Å. In the tenth C site, C(10) is bonded in a distorted single-bond geometry to one C(11), one C(9), and one H(5) atom. The C(10)-C(11) bond length is 1.40 Å. The C(10)-H(5) bond length is 0.93 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(15) atom. The C(11)-C(12) bond length is 1.39 Å. The C(11)-C(15) bond length is 1.50 Å. In the twelfth C site, C(12) is bonded in a distorted single-bond geometry to one C(11), one C(13), and one H(6) atom. The C(12)-C(13) bond length is 1.39 Å. The C(12)-H(6) bond length is 0.93 Å. In the thirteenth C site, C(13) is bonded in a trigonal planar geometry to one C(12), one C(14), and one C(16) atom. The C(13)-C(14) bond length is 1.39 Å. The C(13)-C(16) bond length is 1.50 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13), one C(9), and one H(7) atom. The C(14)-H(7) bond length is 0.93 Å. In the fifteenth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(11), one O(10), and one O(9) atom. The C(15)-O(10) bond length is 1.27 Å. The C(15)-O(9) bond length is 1.24 Å. In the sixteenth C site, C(16) is bonded in a distorted bent 120 degrees geometry to one C(13), one O(7), and one O(8) atom. The C(16)-O(7) bond length is 1.25 Å. The C(16)-O(8) bond length is 1.26 Å. In the seventeenth C site, C(17) is bonded in a distorted trigonal planar geometry to one C(18), one N(1), and one H(8) atom. The C(17)-C(18) bond length is 1.37 Å. The C(17)-N(1) bond length is 1.35 Å. The C(17)-H(8) bond length is 0.93 Å. In the eighteenth C site, C(18) is bonded in a distorted single-bond geometry to one C(17), one C(19), and one H(9) atom. The C(18)-C(19) bond length is 1.39 Å. The C(18)-H(9) bond length is 0.93 Å. In the nineteenth C site, C(19) is bonded in a distorted trigonal planar geometry to one C(18), one C(20), and one N(2) atom. The C(19)-C(20) bond length is 1.39 Å. The C(19)-N(2) bond length is 1.40 Å. In the twentieth C site, C(20) is bonded in a distorted trigonal planar geometry to one C(19), one C(21), and one H(10) atom. The C(20)-C(21) bond length is 1.39 Å. The C(20)-H(10) bond length is 0.93 Å. In the twenty-first C site, C(21) is bonded in a distorted trigonal planar geometry to one C(20), one N(1), and one H(11) atom. The C(21)-N(1) bond length is 1.34 Å. The C(21)-H(11) bond length is 0.93 Å. In the twenty-second C site, C(22) is bonded in a distorted trigonal planar geometry to one C(23), one C(26), and one N(2) atom. The C(22)-C(23) bond length is 1.38 Å. The C(22)-C(26) bond length is 1.40 Å. The C(22)-N(2) bond length is 1.39 Å. In the twenty-third C site, C(23) is bonded in a distorted single-bond geometry to one C(22) and one H(12) atom. The C(23)-H(12) bond length is 0.93 Å. In the twenty-fourth C site, C(24) is bonded in a 2-coordinate geometry to one N(3) and one H(13) atom. The C(24)-N(3) bond length is 1.35 Å. The C(24)-H(13) bond length is 0.93 Å. In the twenty-fifth C site, C(25) is bonded in a distorted bent 120 degrees geometry to one N(3) and one H(14) atom. The C(25)-N(3) bond length is 1.33 Å. The C(25)-H(14) bond length is 0.93 Å. In the twenty-sixth C site, C(26) is bonded in a distorted single-bond geometry to one C(22) and one H(15) atom. The C(26)-H(15) bond length is 0.93 Å. In the twenty-seventh C site, C(27) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(27)-O(1) bond length is 1.25 Å. The C(27)-O(2) bond length is 1.24 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Co(1), one C(17), and one C(21) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(19), one C(22), and one H(2) atom. The N(2)-H(2) bond length is 0.86 Å. In the third N site, N(3) is bonded in a trigonal planar geometry to one Co(2), one C(24), and one C(25) atom. There are fifteen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(11) atom. The H(1)-O(11) bond length is 0.85 Å. In the second H site, H(2) is bonded in a single-bond geometry to one N(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(10) 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(14) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(17) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(18) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(20) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(21) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(23) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one C(24) atom. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one C(25) atom. In the fifteenth H site, H(15) is bonded in a single-bond geometry to one C(26) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Co(1) and one C(27) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Co(2) and one C(27) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(3) and one C(7) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one C(7) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(3) and one C(8) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one C(8) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one C(16) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(1) and one C(16) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one C(15) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Co(3) and one C(15) atom. In the eleventh O site, O(11) is bonded in a distorted single-bond geometry to one Co(1), one Co(2), one Co(3), and one H(1) atom. Linkers: 4 c1cc(Nc2ccncc2)ccn1 ,4 [O]C(=O)c1cc(C([O])=O)cc(-c2c(C([O])=O)cc(C([O])=O)cc2C([O])=O)c1. Metal clusters: 4 O=[C]O[Co]1(O)O[C]O[Co]2O[C]O[Co](O[C]O2)O[C]O1. RCSR code: bnn. The MOF has largest included sphere 5.09 A, density 1.45 g/cm3, surface area 3420.93 m2/g, accessible volume 0.30 cm3/g