Cd2C9H5(N2O3)2 crystallizes in the monoclinic C2/c space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 6-coordinate geometry to two equivalent N(1), two equivalent O(1), and two equivalent O(3) atoms. Both Cd(1)-N(1) bond lengths are 2.53 Å. Both Cd(1)-O(1) bond lengths are 2.18 Å. Both Cd(1)-O(3) bond lengths are 2.23 Å. In the second Cd site, Cd(2) is bonded in a hexagonal planar geometry to two equivalent N(2) and four equivalent O(3) atoms. Both Cd(2)-N(2) bond lengths are 2.32 Å. There are two shorter (2.24 Å) and two longer (2.25 Å) Cd(2)-O(3) bond lengths. There are six inequivalent C sites. In the first C site, C(4) is bonded in a trigonal planar geometry to one C(6) and two equivalent C(3) atoms. The C(4)-C(6) bond length is 1.48 Å. Both C(4)-C(3) bond lengths are 1.39 Å. In the second C site, C(5) is bonded in a distorted trigonal planar geometry to two equivalent C(1) and one H(3) atom. Both C(5)-C(1) bond lengths are 1.38 Å. The C(5)-H(3) bond length is 0.93 Å. In the third C site, C(6) is bonded in a distorted trigonal planar geometry to one C(4) and two equivalent N(1) atoms. Both C(6)-N(1) bond lengths are 1.33 Å. In the fourth C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(5) atom. The C(1)-C(2) bond length is 1.49 Å. The C(1)-C(3) bond length is 1.40 Å. In the fifth C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(2)-O(1) bond length is 1.27 Å. The C(2)-O(2) bond length is 1.23 Å. In the sixth C site, C(3) is bonded in a single-bond geometry to one C(1), one C(4), and one H(1) atom. The C(3)-H(1) bond length is 0.93 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Cd(1), one C(6), and one N(2) atom. The N(1)-N(2) bond length is 1.36 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Cd(2), one N(1), and one N(2) atom. The N(2)-N(2) bond length is 1.29 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(3) atom. The H(2)-O(3) bond length is 0.85 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one Cd(1) and one C(2) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Cd(1), two equivalent Cd(2), and one H(2) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)cc(C2=NN=N[N]2)c1. Metal clusters: 8 [Cd]. The MOF has largest included sphere 6.00 A, density 1.73 g/cm3, surface area 2749.11 m2/g, accessible volume 0.24 cm3/g