CdC9H4(NO2)2 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded to one N(2), one O(1), one O(3), and two equivalent O(4) atoms to form distorted corner-sharing CdNO4 trigonal bipyramids. The Cd(1)-N(2) bond length is 2.24 Å. The Cd(1)-O(1) bond length is 2.31 Å. The Cd(1)-O(3) bond length is 2.24 Å. There is one shorter (2.28 Å) and one longer (2.36 Å) Cd(1)-O(4) bond length. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(5), one C(9), and one N(2) atom. The C(1)-C(5) bond length is 1.42 Å. The C(1)-C(9) bond length is 1.39 Å. The C(1)-N(2) bond length is 1.39 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(1) atom. The C(2)-N(1) bond length is 1.35 Å. The C(2)-N(2) bond length is 1.33 Å. The C(2)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(1), and one O(3) atom. The C(3)-C(6) bond length is 1.50 Å. The C(3)-O(1) bond length is 1.27 Å. The C(3)-O(3) bond length is 1.28 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(5), one C(7), and one H(3) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-C(7) bond length is 1.40 Å. The C(4)-H(3) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(1), one C(4), and one N(1) atom. The C(5)-N(1) bond length is 1.38 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(3), one C(7), and one C(9) atom. The C(6)-C(7) bond length is 1.42 Å. The C(6)-C(9) bond length is 1.40 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(8) atom. The C(7)-C(8) bond length is 1.50 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(2), and one O(4) atom. The C(8)-O(2) bond length is 1.25 Å. The C(8)-O(4) bond length is 1.30 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(1), one C(6), and one H(4) atom. The C(9)-H(4) bond length is 1.09 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one C(2), one C(5), and one H(2) atom. The N(1)-H(2) bond length is 1.05 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(1), and one C(2) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one N(1) and one O(2) atom. The H(2)-O(2) bond length is 1.67 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(9) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one C(3) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one C(8) and one H(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one C(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Cd(1) and one C(8) atom. Linkers: 4 [O]C(=O)c1cc2nc[nH]c2cc1C([O])=O. Metal clusters: 4 [Cd]. The MOF has largest included sphere 1.74 A, density 2.47 g/cm3, surface area 2903.05 m2/g, accessible volume 0.07 cm3/g