Co3C10N5H9SO9 crystallizes in the monoclinic C2/c space group. There are three inequivalent Co sites. In the first Co site, Co(1) is bonded to one N(2), one O(2), one O(3), one O(8), and one O(9) atom to form a mixture of edge and corner-sharing CoNO4 square pyramids. The corner-sharing octahedral tilt angles are 66°. The Co(1)-N(2) bond length is 2.05 Å. The Co(1)-O(2) bond length is 2.16 Å. The Co(1)-O(3) bond length is 2.14 Å. The Co(1)-O(8) bond length is 2.11 Å. The Co(1)-O(9) bond length is 2.10 Å. In the second Co site, Co(2) is bonded to one N(1), one N(5), one O(1), one O(8), and two equivalent O(9) atoms to form CoN2O4 octahedra that share  a cornercorner with one Co(1)NO4 square pyramid,  an edgeedge with one Co(2)N2O4 octahedra, and  an edgeedge with one Co(1)NO4 square pyramid. The Co(2)-N(1) bond length is 2.13 Å. The Co(2)-N(5) bond length is 2.32 Å. The Co(2)-O(1) bond length is 2.13 Å. The Co(2)-O(8) bond length is 2.15 Å. There is one shorter (2.09 Å) and one longer (2.11 Å) Co(2)-O(9) bond length. In the third Co site, Co(3) is bonded in a 5-coordinate geometry to one N(3), one O(2), one O(4), one O(6), and one O(8) atom. The Co(3)-N(3) bond length is 2.01 Å. The Co(3)-O(2) bond length is 2.56 Å. The Co(3)-O(4) bond length is 1.95 Å. The Co(3)-O(6) bond length is 2.04 Å. The Co(3)-O(8) bond length is 1.93 Å. There are ten 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 N(4) atom. The C(1)-N(2) bond length is 1.32 Å. The C(1)-N(3) bond length is 1.36 Å. The C(1)-N(4) bond length is 1.36 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(1), one N(3), and one N(5) atom. The C(2)-N(1) bond length is 1.32 Å. The C(2)-N(3) bond length is 1.36 Å. The C(2)-N(5) bond length is 1.40 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(4), one C(8), and one C(9) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-C(8) bond length is 1.38 Å. The C(3)-C(9) bond length is 1.50 Å. In the fourth C site, C(4) is bonded in a single-bond geometry to one C(3), one C(5), and one H(7) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(7) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(10), one C(4), and one C(6) atom. The C(5)-C(10) bond length is 1.50 Å. The C(5)-C(6) bond length is 1.38 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(5), one C(7), and one H(8) atom. The C(6)-C(7) bond length is 1.39 Å. The C(6)-H(8) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(6), one C(8), and one S(1) atom. The C(7)-C(8) bond length is 1.39 Å. The C(7)-S(1) bond length is 1.76 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(3), one C(7), and one H(9) atom. The C(8)-H(9) bond length is 0.93 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(2) atom. The C(9)-O(1) bond length is 1.25 Å. The C(9)-O(2) bond length is 1.26 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(3), and one O(4) atom. The C(10)-O(3) bond length is 1.25 Å. The C(10)-O(4) bond length is 1.27 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(2), one C(2), and one N(2) atom. The N(1)-N(2) bond length is 1.41 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 trigonal planar geometry to one Co(3), one C(1), and one C(2) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one C(1) and two equivalent H(3,4) atoms. Both N(4)-H(3,4) bond lengths are 0.86 Å. In the fifth N site, N(5) is bonded in a 2-coordinate geometry to one Co(2), one C(2), one H(5), and one H(6) atom. The N(5)-H(5) bond length is 0.90 Å. The N(5)-H(6) bond length is 0.90 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(8) atom. The H(1)-O(8) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(9) atom. The H(2)-O(9) bond length is 0.98 Å. In the third H site, H(3,4) is bonded in a single-bond geometry to one N(4) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one N(5) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one N(5) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one C(4) atom. In the seventh H site, H(8) is bonded in a single-bond geometry to one C(6) atom. In the eighth H site, H(9) is bonded in a single-bond geometry to one C(8) atom. S(1) is bonded in a distorted trigonal non-coplanar geometry to one C(7), one O(5), one O(6), and one O(7) atom. The S(1)-O(5) bond length is 1.44 Å. The S(1)-O(6) bond length is 1.47 Å. The S(1)-O(7) bond length is 1.43 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Co(2) and one C(9) atom. In the second O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(10) atom. In the third O site, O(4) is bonded in a bent 120 degrees geometry to one Co(3) and one C(10) atom. In the fourth O site, O(2) is bonded in a distorted single-bond geometry to one Co(1), one Co(3), and one C(9) atom. In the fifth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(3) and one S(1) atom. In the sixth O site, O(7) is bonded in a single-bond geometry to one S(1) atom. In the seventh O site, O(8) is bonded in a distorted tetrahedral geometry to one Co(1), one Co(2), one Co(3), and one H(1) atom. In the eighth O site, O(9) is bonded in a distorted single-bond geometry to one Co(1), two equivalent Co(2), and one H(2) atom. In the ninth O site, O(5) is bonded in a single-bond geometry to one S(1) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)cc(S([O])([O])[O])c1 ,3 NC1=NN=C(N)[N]1 ,1 NC1=[N]=C(N=N1)N. Metal clusters: 12 [Co]. The MOF has largest included sphere 4.44 A, density 1.75 g/cm3, surface area 2809.25 m2/g, accessible volume 0.20 cm3/g