CoC6H4(N3O2)2 crystallizes in the cubic I-43m space group. Co(1) is bonded in a tetrahedral geometry to four equivalent N(1) atoms. All Co(1)-N(1) bond lengths are 1.99 Å. There are two inequivalent C sites. In the first C site, C(2) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(1) atom. The C(2)-N(1) bond length is 1.36 Å. The C(2)-H(1) bond length is 1.08 Å. In the second C site, C(1) is bonded in a trigonal planar geometry to one N(2) and two equivalent N(1) atoms. The C(1)-N(2) bond length is 1.41 Å. Both C(1)-N(1) bond lengths are 1.35 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(1), and one C(2) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one C(1) and two equivalent O(1) atoms. Both N(2)-O(1) bond lengths are 1.25 Å. H(1) is bonded in a single-bond geometry to one C(2) atom. O(1) is bonded in a single-bond geometry to one N(2) atom. Linkers: 9 O=[N+]([O-])C1=NC=C[N]1 ,3 O=[N+]([O-])C1=N[CH]C=N1. Metal clusters: 6 [Co]. The MOF has largest included sphere 11.04 A, density 1.11 g/cm3, surface area 3477.29 m2/g, accessible volume 0.54 cm3/g