CoC11N2H8O5 crystallizes in the triclinic P-1 space group. Co(1) is bonded to one N(1), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form distorted edge-sharing CoNO5 octahedra. The Co(1)-N(1) bond length is 2.04 Å. The Co(1)-O(3) bond length is 1.99 Å. The Co(1)-O(4) bond length is 2.02 Å. The Co(1)-O(5) bond length is 2.10 Å. There is one shorter (2.22 Å) and one longer (2.32 Å) Co(1)-O(1) bond length. There are eleven inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.51 Å. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.27 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(4) bond length is 1.41 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(3) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(3) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(7) atom. The C(4)-C(7) bond length is 1.50 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(8), one N(1), and one H(4) atom. The C(5)-C(8) bond length is 1.38 Å. The C(5)-N(1) bond length is 1.35 Å. The C(5)-H(4) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(5) atom. The C(6)-N(1) bond length is 1.35 Å. The C(6)-H(5) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(7)-O(3) bond length is 1.28 Å. The C(7)-O(4) bond length is 1.27 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(10), one C(5), and one H(6) atom. The C(8)-C(10) bond length is 1.41 Å. The C(8)-H(6) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(10) and one H(7) atom. The C(9)-C(10) bond length is 1.41 Å. The C(9)-H(7) bond length is 1.09 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(8), and one C(9) atom. The C(10)-C(11) bond length is 1.45 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(10), one N(2), and one H(8) atom. The C(11)-N(2) bond length is 1.30 Å. The C(11)-H(8) bond length is 1.10 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Co(1), one C(5), and one C(6) atom. In the second N site, N(2) is bonded in a distorted water-like geometry to one C(11) and one N(2) atom. The N(2)-N(2) bond length is 1.39 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(2) and one O(5) atom. The H(1)-O(2) bond length is 1.49 Å. The H(1)-O(5) bond length is 1.04 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(5) atom. The H(2)-O(5) bond length is 0.97 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) 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(6) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(8) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(9) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(11) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Co(1) and one C(1) atom. In the second O site, O(2) is bonded in a water-like geometry to one C(1) and one H(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(7) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Co(1) and one C(7) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Co(1), one H(1), and one H(2) atom. Linkers: 1 [CH]([N][N][CH]c1ccncc1)c1ccncc1 ,1 [O]C(=O)c1cc(C([O])=O)c(C([O])=O)cc1C([O])=O. Metal clusters: 1 O.O.O=[C]O[Co]1O[C]O[Co](O[C]=O)O[C]O1. The MOF has largest included sphere 2.78 A, density 1.77 g/cm3, surface area 3187.30 m2/g, accessible volume 0.10 cm3/g