CdC9H17(NO2)2 crystallizes in the tetragonal P4_2/nmc space group. Cd(1) is bonded to two equivalent N(1) and four equivalent O(1) atoms to form distorted edge-sharing CdN2O4 pentagonal pyramids. Both Cd(1)-N(1) bond lengths are 2.27 Å. There are two shorter (2.29 Å) and two longer (2.45 Å) Cd(1)-O(1) bond lengths. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one N(1) atom. The C(2)-N(1) bond length is 1.37 Å. In the third C site, C(3) is bonded in a 5-coordinate geometry to one H(1), one H(4), one H(6), one H(7), and one H(8) atom. The C(3)-H(1) bond length is 0.90 Å. The C(3)-H(4) bond length is 0.85 Å. The C(3)-H(6) bond length is 0.96 Å. The C(3)-H(7) bond length is 0.96 Å. The C(3)-H(8) bond length is 0.96 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(5) and two equivalent N(1) atoms. The C(4)-C(5) bond length is 1.47 Å. Both C(4)-N(1) bond lengths are 1.35 Å. In the fifth C site, C(5) is bonded in a 6-coordinate geometry to one C(4), two equivalent H(1), two equivalent H(4), and two equivalent H(5) atoms. Both C(5)-H(1) bond lengths are 0.96 Å. Both C(5)-H(4) bond lengths are 0.96 Å. Both C(5)-H(5) bond lengths are 0.96 Å. In the sixth C site, C(6) is bonded in a distorted pentagonal planar geometry to one H(9), two equivalent H(2), and two equivalent H(4) atoms. The C(6)-H(9) bond length is 0.96 Å. Both C(6)-H(2) bond lengths are 0.96 Å. Both C(6)-H(4) bond lengths are 0.96 Å. N(1) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(2), and one C(4) atom. There are nine inequivalent H sites. In the first H site, H(1) is bonded in a 3-coordinate geometry to one C(3), one C(5), and one H(5) atom. The H(1)-H(5) bond length is 0.60 Å. In the second H site, H(2) is bonded in a single-bond geometry to one C(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(2) atom. The H(3)-O(2) bond length is 0.82 Å. In the fourth H site, H(4) is bonded in a 3-coordinate geometry to one C(3), one C(5), and one C(6) atom. In the fifth H site, H(5) is bonded in a 3-coordinate geometry to one C(5), one H(1), and one H(5) atom. The H(5)-H(5) bond length is 0.64 Å. In the sixth H site, H(6) is bonded in a distorted single-bond geometry to one C(3) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(3) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(3) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(6) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Cd(1) and one C(1) atom. In the second O site, O(2) is bonded in a water-like geometry to one C(1) and one H(3) atom. Linkers: 4 C.C.O=C(O)[C]1N=[C]N=C1C(=O)O.[CH3].[CH].[H].[H].[H] ,4 C.C.O=C(O)C1=C(C(=O)O)N=[C][N]1.[CH3].[CH].[H].[H].[H]. Metal clusters: 8 [Cd]. The MOF has largest included sphere 3.96 A, density 2.42 g/cm3, surface area 2301.05 m2/g, accessible volume 0.09 cm3/g