CoC18NH11O4 crystallizes in the triclinic P1 space group. The structure consists of a CoC18NH11O4 framework. Co(1,2) is bonded in a square pyramidal geometry to one N(1,2); one O(1,5); one O(2,6); one O(3,7); and one O(4,8) atom. The Co(1,2)-N(1,2) bond length is 2.06 Å. The Co(1,2)-O(1,5) bond length is 2.04 Å. The Co(1,2)-O(2,6) bond length is 2.02 Å. The Co(1,2)-O(3,7) bond length is 2.05 Å. The Co(1,2)-O(4,8) bond length is 2.04 Å. There are nineteen inequivalent C sites. In the first C site, C(1,19) is bonded in a distorted trigonal planar geometry to one C(2,20); one N(1,2); and one H(1,12) atom. The C(1,19)-C(2,20) bond length is 1.39 Å. The C(1,19)-N(1,2) bond length is 1.34 Å. The C(1,19)-H(1,12) bond length is 1.14 Å. In the second C site, C(2,20) is bonded in a distorted single-bond geometry to one C(1,19); one C(3,21); and one H(2,13) atom. The C(2,20)-C(3,21) bond length is 1.39 Å. The C(2,20)-H(2,13) bond length is 1.14 Å. In the third C site, C(3,21) is bonded in a trigonal planar geometry to one C(2,20); one C(4,22); and one C(6,24) atom. The C(3,21)-C(4,22) bond length is 1.39 Å. The C(3,21)-C(6,24) bond length is 1.47 Å. In the fourth C site, C(4,22) is bonded in a distorted trigonal planar geometry to one C(3,21); one C(5,23); and one H(3,14) atom. The C(4,22)-C(5,23) bond length is 1.38 Å. The C(4,22)-H(3,14) bond length is 1.14 Å. In the fifth C site, C(5,23) is bonded in a distorted trigonal planar geometry to one C(4,22); one N(1,2); and one H(4,15) atom. The C(5,23)-N(1,2) bond length is 1.35 Å. The C(5,23)-H(4,15) bond length is 1.14 Å. In the sixth C site, C(6,24) is bonded in a distorted single-bond geometry to one C(3,21); one C(6,24); and one H(5,16) atom. The C(6,24)-C(6,24) bond length is 1.33 Å. The C(6,24)-H(5,16) bond length is 1.14 Å. In the seventh C site, C(7,25) is bonded in a distorted bent 120 degrees geometry to one C(8); one O(1,5); and one O(2,6) atom. The C(7,25)-C(8) bond length is 1.49 Å. The C(7,25)-O(1,5) bond length is 1.25 Å. The C(7,25)-O(2,6) bond length is 1.26 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(12,30); one C(7,25); and one C(9,27) atom. The C(8)-C(12,30) bond length is 1.42 Å. The C(8)-C(9,27) bond length is 1.37 Å. In the ninth C site, C(9,27) is bonded in a distorted single-bond geometry to one C(10,28); one C(8); and one H(6,17) atom. The C(9,27)-C(10,28) bond length is 1.41 Å. The C(9,27)-H(6,17) bond length is 1.14 Å. In the tenth C site, C(10,28) is bonded in a trigonal planar geometry to one C(10,28); one C(11,29); and one C(9,27) atom. The C(10,28)-C(10,28) bond length is 1.42 Å. The C(10,28)-C(11,29) bond length is 1.42 Å. In the eleventh C site, C(11,29) is bonded in a distorted single-bond geometry to one C(10,28) and one H(7,18) atom. The C(11,29)-H(7,18) bond length is 1.14 Å. In the twelfth C site, C(12,30) is bonded in a distorted single-bond geometry to one C(8) and one H(8) atom. The C(12,30)-H(8) bond length is 1.14 Å. In the thirteenth C site, C(13,31) is bonded in a distorted bent 120 degrees geometry to one C(14,32); one O(3,7); and one O(4,8) atom. The C(13,31)-C(14,32) bond length is 1.49 Å. The C(13,31)-O(3,7) bond length is 1.26 Å. The C(13,31)-O(4,8) bond length is 1.26 Å. In the fourteenth C site, C(14,32) is bonded in a trigonal planar geometry to one C(13,31); one C(15,33); and one C(18,36) atom. The C(14,32)-C(15,33) bond length is 1.38 Å. The C(14,32)-C(18,36) bond length is 1.41 Å. In the fifteenth C site, C(15,33) is bonded in a distorted single-bond geometry to one C(14,32); one C(16,34); and one H(9,20) atom. The C(15,33)-C(16,34) bond length is 1.40 Å. The C(15,33)-H(9,20) bond length is 1.14 Å. In the sixteenth C site, C(16,34) is bonded in a trigonal planar geometry to one C(15,33); one C(16,34); and one C(17,35) atom. The C(16,34)-C(16,34) bond length is 1.41 Å. The C(16,34)-C(17,35) bond length is 1.43 Å. In the seventeenth C site, C(17,35) is bonded in a distorted single-bond geometry to one C(16,34) and one H(10,21) atom. The C(17,35)-H(10,21) bond length is 1.14 Å. In the eighteenth C site, C(18,36) is bonded in a distorted single-bond geometry to one C(14,32) and one H(11,22) atom. The C(18,36)-H(11,22) bond length is 1.14 Å. In the nineteenth C site, C(26) is bonded in a trigonal planar geometry to one C(12,30); one C(7,25); and one C(9,27) atom. The C(26)-C(12,30) bond length is 1.42 Å. The C(26)-C(7,25) bond length is 1.49 Å. The C(26)-C(9,27) bond length is 1.37 Å. N(1,2) is bonded in a trigonal planar geometry to one Co(1,2); one C(1,19); and one C(5,23) atom. There are twelve inequivalent H sites. In the first H site, H(1,12) is bonded in a single-bond geometry to one C(1,19) atom. In the second H site, H(2,13) is bonded in a single-bond geometry to one C(2,20) atom. In the third H site, H(3,14) is bonded in a single-bond geometry to one C(4,22) atom. In the fourth H site, H(4,15) is bonded in a single-bond geometry to one C(5,23) atom. In the fifth H site, H(5,16) is bonded in a single-bond geometry to one C(6,24) atom. In the sixth H site, H(6,17) is bonded in a single-bond geometry to one C(9,27) atom. In the seventh H site, H(7,18) is bonded in a single-bond geometry to one C(11,29) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(12,30) atom. In the ninth H site, H(9,20) is bonded in a single-bond geometry to one C(15,33) atom. In the tenth H site, H(10,21) is bonded in a single-bond geometry to one C(17,35) atom. In the eleventh H site, H(11,22) is bonded in a single-bond geometry to one C(18,36) atom. In the twelfth H site, H(19) is bonded in a single-bond geometry to one C(12,30) atom. The H(19)-C(12,30) bond length is 1.14 Å. There are four inequivalent O sites. In the first O site, O(1,5) is bonded in a distorted bent 120 degrees geometry to one Co(1,2) and one C(7,25) atom. In the second O site, O(2,6) is bonded in a bent 120 degrees geometry to one Co(1,2) and one C(7,25) atom. In the third O site, O(3,7) is bonded in a bent 120 degrees geometry to one Co(1,2) and one C(13,31) atom. In the fourth O site, O(4,8) is bonded in a bent 120 degrees geometry to one Co(1,2) and one C(13,31) atom. Linkers: 4 C(=C/c1ccncc1)\c1ccncc1 ,6 [O]C(=O)c1ccc2cc(C([O])=O)ccc2c1. Metal clusters: 3 [C]1O[Co]234O[C]O[Co]2(O1)(O[C]O3)O[C]O4. RCSR code: sql. The MOF has largest included sphere 4.93 A, density 1.30 g/cm3, surface area 4180.29 m2/g, accessible volume 0.25 cm3/g