CuC6H2(NO2)2 crystallizes in the monoclinic C2/c space group. Cu(1) is bonded in an octahedral geometry to two equivalent N(1), two equivalent O(1), and two equivalent O(2) atoms. Both Cu(1)-N(1) bond lengths are 1.97 Å. Both Cu(1)-O(1) bond lengths are 1.97 Å. Both Cu(1)-O(2) bond lengths are 2.46 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(1), one N(1), and one H(1) atom. The C(1)-C(1) bond length is 1.40 Å. The C(1)-N(1) bond length is 1.33 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(2), one C(3), and one N(1) atom. The C(2)-C(2) bond length is 1.40 Å. The C(2)-C(3) bond length is 1.52 Å. The C(2)-N(1) bond length is 1.35 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(3)-O(1) bond length is 1.29 Å. The C(3)-O(2) bond length is 1.24 Å. N(1) is bonded in a trigonal planar geometry to one Cu(1), one C(1), and one C(2) atom. H(1) is bonded in a single-bond geometry to one C(1) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(3) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Cu(1) and one C(3) atom. Linkers: 2 [O]C(=O)c1nccnc1C([O])=O. Metal clusters: 2 [Cu]. The MOF has largest included sphere 1.57 A, density 2.39 g/cm3, surface area 2781.77 m2/g, accessible volume 0.06 cm3/g