CoC3N7H crystallizes in the orthorhombic Pbcm space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a rectangular see-saw-like geometry to two equivalent N(1) and two equivalent N(2) atoms. Both Co(1)-N(1) bond lengths are 2.26 Å. Both Co(1)-N(2) bond lengths are 2.25 Å. In the second Co site, Co(2) is bonded in an octahedral geometry to two equivalent N(3), two equivalent N(4), and two equivalent N(5) atoms. Both Co(2)-N(3) bond lengths are 2.32 Å. Both Co(2)-N(4) bond lengths are 2.22 Å. Both Co(2)-N(5) bond lengths are 2.23 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(2), one N(3), and one H(1) atom. The C(1)-N(2) bond length is 1.32 Å. The C(1)-N(3) bond length is 1.34 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one N(3) atom. The C(2)-C(3) bond length is 1.45 Å. The C(2)-N(1) bond length is 1.32 Å. The C(2)-N(3) bond length is 1.34 Å. In the third C site, C(3) is bonded in a distorted water-like geometry to one C(2), one N(4), and one N(6) atom. The C(3)-N(4) bond length is 1.34 Å. The C(3)-N(6) bond length is 1.33 Å. There are seven inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Co(1), one C(2), and one N(2) atom. The N(1)-N(2) bond length is 1.39 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Co(1), one C(1), and one N(1) atom. In the third N site, N(3) is bonded in a 3-coordinate geometry to one Co(2), one C(1), and one C(2) atom. In the fourth N site, N(4) is bonded in a 3-coordinate geometry to one Co(2), one C(3), and one N(5) atom. The N(4)-N(5) bond length is 1.35 Å. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one Co(2), one N(4), and one N(7) atom. The N(5)-N(7) bond length is 1.32 Å. In the sixth N site, N(6) is bonded in a distorted single-bond geometry to one C(3) and one N(7) atom. The N(6)-N(7) bond length is 1.36 Å. In the seventh N site, N(7) is bonded in a water-like geometry to one N(5) and one N(6) atom. H(1) is bonded in a single-bond geometry to one C(1) atom. Linkers: 5 C1=NN=C(C2=NN=N[N]2)[N]1 ,1 N1=NN=C([N]1)C1=[N]=CN=N1. Metal clusters: 8 [Co]. The MOF has largest included sphere 4.10 A, density 1.77 g/cm3, surface area 3108.11 m2/g, accessible volume 0.19 cm3/g