CuC6NH5O3 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded to one N(1), one O(2), and three equivalent O(1) atoms to form a mixture of edge and corner-sharing CuNO4 trigonal bipyramids. The Cu(1)-N(1) bond length is 1.96 Å. The Cu(1)-O(2) bond length is 2.01 Å. There are a spread of Cu(1)-O(1) bond distances ranging from 1.95-2.28 Å. There are six inequivalent C sites. In the first C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(6) atom. The C(3)-C(2) bond length is 1.40 Å. The C(3)-C(4) bond length is 1.40 Å. The C(3)-C(6) bond length is 1.51 Å. In the second C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(4) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(4) bond length is 1.09 Å. In the third C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(5) atom. The C(5)-N(1) bond length is 1.35 Å. The C(5)-H(5) bond length is 1.09 Å. In the fourth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(2), and one O(3) atom. The C(6)-O(2) bond length is 1.29 Å. The C(6)-O(3) bond length is 1.26 Å. In the fifth C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one H(2) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.35 Å. The C(1)-H(2) bond length is 1.09 Å. In the sixth C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(3) atom. The C(2)-H(3) bond length is 1.09 Å. N(1) is bonded in a trigonal planar geometry to one Cu(1), one C(1), and one C(5) atom. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 1.00 Å. In the second H site, H(2) is bonded in a single-bond geometry to one C(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(5) atom. There are three inequivalent O sites. In the first O site, O(3) is bonded in a distorted single-bond geometry to one C(6) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to three equivalent Cu(1) and one H(1) atom. In the third O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(6) atom. Linkers: 4 [O]C(=O)c1ccncc1. Metal clusters: 4 [Cu]. The MOF has largest included sphere 3.34 A, density 1.87 g/cm3, surface area 3543.58 m2/g, accessible volume 0.14 cm3/g