CdC6N8H8O5 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded to one N(3), one N(7), one O(2), one O(4), one O(5), and two equivalent O(3) atoms to form distorted corner-sharing CdN2O5 pentagonal bipyramids. The Cd(1)-N(3) bond length is 2.32 Å. The Cd(1)-N(7) bond length is 2.27 Å. The Cd(1)-O(2) bond length is 2.51 Å. The Cd(1)-O(4) bond length is 2.53 Å. The Cd(1)-O(5) bond length is 2.41 Å. There is one shorter (2.39 Å) and one longer (2.55 Å) Cd(1)-O(3) bond length. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(2) and one N(3) atom. The C(1)-N(2) bond length is 1.33 Å. The C(1)-N(3) bond length is 1.37 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(4) atom. The C(2)-N(1) bond length is 1.36 Å. The C(2)-N(3) bond length is 1.35 Å. The C(2)-N(4) bond length is 1.34 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(3)-O(1) bond length is 1.27 Å. The C(3)-O(2) bond length is 1.27 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one N(6) and one N(7) atom. The C(4)-N(6) bond length is 1.33 Å. The C(4)-N(7) bond length is 1.37 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one N(5), one N(7), and one N(8) atom. The C(5)-N(5) bond length is 1.36 Å. The C(5)-N(7) bond length is 1.35 Å. The C(5)-N(8) bond length is 1.34 Å. In the sixth C site, C(6) is bonded in a bent 120 degrees geometry to one O(3) and one O(4) atom. The C(6)-O(3) bond length is 1.28 Å. The C(6)-O(4) bond length is 1.27 Å. There are eight inequivalent N sites. In the first N site, N(1) is bonded in a 2-coordinate geometry to one C(2), one N(2), and one H(1) atom. The N(1)-N(2) bond length is 1.36 Å. The N(1)-H(1) bond length is 1.05 Å. In the second N site, N(2) is bonded in a distorted water-like geometry to one C(1) and one N(1) atom. In the third N site, N(3) is bonded in a distorted trigonal non-coplanar geometry to one Cd(1), 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(2), one H(2), and one H(3) atom. The N(4)-H(2) bond length is 1.02 Å. The N(4)-H(3) bond length is 1.02 Å. In the fifth N site, N(5) is bonded in a 2-coordinate geometry to one C(5), one N(6), and one H(4) atom. The N(5)-N(6) bond length is 1.36 Å. The N(5)-H(4) bond length is 1.05 Å. In the sixth N site, N(6) is bonded in a water-like geometry to one C(4) and one N(5) atom. In the seventh N site, N(7) is bonded in a 3-coordinate geometry to one Cd(1), one C(4), and one C(5) atom. In the eighth N site, N(8) is bonded in a trigonal planar geometry to one C(5), one H(5), and one H(6) atom. The N(8)-H(5) bond length is 1.02 Å. The N(8)-H(6) bond length is 1.02 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one N(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(4) 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) is bonded in a distorted linear geometry to one N(5) and one O(1) atom. The H(4)-O(1) bond length is 1.62 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(8) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one N(8) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(1) and one O(5) atom. The H(7)-O(1) bond length is 1.71 Å. The H(7)-O(5) bond length is 1.00 Å. In the eighth H site, H(8) is bonded in a distorted single-bond geometry to one O(2) and one O(5) atom. The H(8)-O(2) bond length is 1.65 Å. The H(8)-O(5) bond length is 1.01 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one C(3), one H(4), and one H(7) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Cd(1), one C(3), and one H(8) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Cd(1) and one C(6) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cd(1) and one C(6) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one Cd(1), one H(7), and one H(8) atom. Linkers: 4 Nc1nc(C([O])=O)n[nH]1 ,2 N[C]1N=C(C([O])=O)[N]N1. Metal clusters: 4 [Cd]. The MOF has largest included sphere 1.94 A, density 2.36 g/cm3, surface area 3019.51 m2/g, accessible volume 0.06 cm3/g