Co3C26N3H12O13C4NH2 crystallizes in the trigonal R-3m space group. The structure consists of six C4NH2 clusters inside a Co3C26N3H12O13 framework. In each C4NH2 cluster, there are three inequivalent C sites. In the first C site, C(19) is bonded in a distorted trigonal planar geometry to one C(20) and two equivalent C(6) atoms. The C(19)-C(20) bond length is 1.50 Å. Both C(19)-C(6) bond lengths are 1.40 Å. In the second C site, C(6) is bonded in a distorted single-bond geometry to one C(19) and one H(4) atom. The C(6)-H(4) bond length is 0.93 Å. In the third C site, C(20) is bonded in a distorted trigonal planar geometry to one C(19) and two equivalent N(3) atoms. Both C(20)-N(3) bond lengths are 1.34 Å. N(3) is bonded in a bent 120 degrees geometry to two equivalent C(20) atoms. H(4) is bonded in a single-bond geometry to one C(6) atom. In the Co3C26N3H12O13 framework, there are three inequivalent Co sites. In the first Co site, Co(1) is bonded in a square pyramidal geometry to one O(7), two equivalent O(2), and two equivalent O(4) atoms. The Co(1)-O(7) bond length is 2.15 Å. Both Co(1)-O(2) bond lengths are 2.05 Å. Both Co(1)-O(4) bond lengths are 2.10 Å. In the second Co site, Co(2) is bonded in a rectangular see-saw-like geometry to one N(1), one O(7), and two equivalent O(1) atoms. The Co(2)-N(1) bond length is 2.12 Å. The Co(2)-O(7) bond length is 2.07 Å. Both Co(2)-O(1) bond lengths are 2.04 Å. In the third Co site, Co(3) is bonded in a distorted trigonal bipyramidal geometry to one N(2), two equivalent O(3), and two equivalent O(6) atoms. The Co(3)-N(2) bond length is 2.16 Å. Both Co(3)-O(3) bond lengths are 2.01 Å. Both Co(3)-O(6) bond lengths are 2.20 Å. There are seventeen inequivalent C sites. In the first C site, C(11) is bonded in a trigonal planar geometry to one C(13) and two equivalent C(5) atoms. The C(11)-C(13) bond length is 1.53 Å. Both C(11)-C(5) bond lengths are 1.39 Å. In the second C site, C(12) is bonded in a distorted single-bond geometry to two equivalent C(4) and one H(7) atom. Both C(12)-C(4) bond lengths are 1.39 Å. The C(12)-H(7) bond length is 0.93 Å. In the third C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(11) and two equivalent O(3) atoms. Both C(13)-O(3) bond lengths are 1.25 Å. In the fourth C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(1), and one O(2) atom. The C(1)-C(4) bond length is 1.50 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.25 Å. In the fifth C site, C(2) is bonded in a distorted single-bond geometry to one C(15), one C(3), and one H(1) atom. The C(2)-C(15) bond length is 1.39 Å. The C(2)-C(3) bond length is 1.38 Å. The C(2)-H(1) bond length is 0.93 Å. In the sixth C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one H(2) atom. The C(3)-N(1) bond length is 1.33 Å. The C(3)-H(2) bond length is 0.93 Å. In the seventh C site, C(4) is bonded in a trigonal planar geometry to one C(1), one C(12), and one C(5) atom. The C(4)-C(5) bond length is 1.39 Å. In the eighth C site, C(7) is bonded in a bent 120 degrees geometry to one C(9), one O(4), and one O(5) atom. The C(7)-C(9) bond length is 1.49 Å. The C(7)-O(4) bond length is 1.24 Å. The C(7)-O(5) bond length is 1.35 Å. In the ninth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(5) atom. The C(8)-N(2) bond length is 1.34 Å. The C(8)-H(5) bond length is 0.93 Å. In the tenth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(18), and one C(7) atom. The C(9)-C(10) bond length is 1.40 Å. The C(9)-C(18) bond length is 1.39 Å. In the eleventh C site, C(10) is bonded in a distorted single-bond geometry to one C(16), one C(9), and one H(6) atom. The C(10)-C(16) bond length is 1.39 Å. The C(10)-H(6) bond length is 0.93 Å. In the twelfth C site, C(5) is bonded in a distorted single-bond geometry to one C(11), one C(4), and one H(3) atom. The C(5)-H(3) bond length is 0.93 Å. In the thirteenth C site, C(14) is bonded in a distorted trigonal planar geometry to one C(15) and two equivalent N(4) atoms. The C(14)-C(15) bond length is 1.47 Å. Both C(14)-N(4) bond lengths are 1.34 Å. In the fourteenth C site, C(15) is bonded in a trigonal planar geometry to one C(14) and two equivalent C(2) atoms. In the fifteenth C site, C(16) is bonded in a distorted trigonal planar geometry to one C(17) and two equivalent C(10) atoms. The C(16)-C(17) bond length is 1.46 Å. In the sixteenth C site, C(17) is bonded in a bent 120 degrees geometry to one C(16) and two equivalent O(6) atoms. Both C(17)-O(6) bond lengths are 1.27 Å. In the seventeenth C site, C(18) is bonded in a distorted single-bond geometry to two equivalent C(9) and one H(8) atom. The C(18)-H(8) bond length is 0.93 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Co(2) and two equivalent C(3) atoms. In the second N site, N(2) is bonded in a trigonal planar geometry to one Co(3) and two equivalent C(8) atoms. In the third N site, N(4) is bonded in a bent 120 degrees geometry to two equivalent C(14) atoms. There are seven inequivalent H sites. In the first H site, H(8) is bonded in a single-bond geometry to one C(18) atom. In the second H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(8) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(10) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(12) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one C(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Co(3) and one C(13) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(7) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one C(7) atom. In the sixth O site, O(6) is bonded in an L-shaped geometry to one Co(3) and one C(17) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(1) and one Co(2) atom. Linkers: 12 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1 ,4 n1ccc(cc1)C1=NC(=[N]=C([N]1)c1ccncc1)c1ccncc1. Metal clusters: 6 [O][C]O[Co]12(O[C][O])O[C]O[Co](O[C]O1)O2 ,3 [C]1O[Co]2(O1)O[C]O[Co]1(O[C]O1)O[C]O2. RCSR code: gee. The MOF has largest included sphere 9.42 A, density 0.98 g/cm3, surface area 3842.51 m2/g, accessible volume 0.56 cm3/g