Co12C88N80H72Cl3 crystallizes in the tetragonal P4/mmm space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to four equivalent N(1) and one Cl(1) atom to form corner-sharing CoN4Cl square pyramids. All Co(1)-N(1) bond lengths are 1.98 Å. The Co(1)-Cl(1) bond length is 2.45 Å. In the second Co site, Co(2) is bonded to four equivalent N(3) and one Cl(1) atom to form corner-sharing CoN4Cl square pyramids. All Co(2)-N(3) bond lengths are 1.98 Å. The Co(2)-Cl(1) bond length is 2.45 Å. In the third Co site, Co(3) is bonded to four equivalent N(5) and one Cl(2) atom to form corner-sharing CoN4Cl square pyramids. All Co(3)-N(5) bond lengths are 1.98 Å. The Co(3)-Cl(2) bond length is 2.45 Å. There are seven inequivalent C sites. In the first C site, C(6) is bonded in a distorted single-bond geometry to two equivalent C(2) and one H(4,5) atom. Both C(6)-C(2) bond lengths are 1.39 Å. The C(6)-H(4,5) bond length is 0.95 Å. In the second C site, C(7) is bonded in a distorted single-bond geometry to one C(2); one C(4); and one H(4,5) atom. The C(7)-C(2) bond length is 1.39 Å. The C(7)-C(4) bond length is 1.39 Å. The C(7)-H(4,5) bond length is 0.95 Å. In the third C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(1) atom. The C(1)-N(1) bond length is 1.32 Å. The C(1)-H(1) bond length is 0.95 Å. In the fourth C site, C(2) is bonded in a trigonal planar geometry to one C(3), one C(6), and one C(7) atom. The C(2)-C(3) bond length is 1.48 Å. In the fifth C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one N(2) atom. The C(3)-N(2) bond length is 1.37 Å. In the sixth C site, C(4) is bonded in a trigonal planar geometry to one C(5) and two equivalent C(7) atoms. The C(4)-C(5) bond length is 1.48 Å. In the seventh C site, C(5) is bonded in a distorted water-like geometry to one C(4) and two equivalent N(4) atoms. Both C(5)-N(4) bond lengths are 1.37 Å. There are five inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Co(1), one C(1), and one N(3) atom. The N(1)-N(3) bond length is 1.36 Å. In the second N site, N(2) is bonded in a 3-coordinate geometry to one C(3), one N(3), and one H(2) atom. The N(2)-N(3) bond length is 1.32 Å. The N(2)-H(2) bond length is 0.95 Å. In the third N site, N(3) is bonded in a distorted single-bond geometry to one Co(2), one N(1), and one N(2) atom. In the fourth N site, N(4) is bonded in a 3-coordinate geometry to one C(5), one N(5), and one H(3) atom. The N(4)-N(5) bond length is 1.32 Å. The N(4)-H(3) bond length is 0.95 Å. In the fifth N site, N(5) is bonded in a distorted single-bond geometry to one Co(3), one N(4), and one N(5) atom. The N(5)-N(5) bond length is 1.36 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(4) atom. In the fourth H site, H(4,5) is bonded in a single-bond geometry to one C(6) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a square co-planar geometry to two equivalent Co(1) and two equivalent Co(2) atoms. In the second Cl site, Cl(2) is bonded in a square co-planar geometry to four equivalent Co(3) atoms. Linkers: 8 c1c([C]2NN=NN2)cc(-c2cnn[nH]2)cc1-c1cnn[nH]1. Metal clusters: 3 Cl[Co]123N=N[Co@]4(=N[N][Co@@]5(=NN=[Co@@](N=N5)(N=N1)N=N2)N=N4)N=N3. The MOF has largest included sphere 15.57 A, density 0.78 g/cm3, surface area 3533.36 m2/g, accessible volume 0.86 cm3/g