CuC3NHO2 crystallizes in the monoclinic C2/c space group. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted trigonal pyramidal geometry to one N(1), one N(2), one O(1), and one O(3) atom. The Cu(1)-N(1) bond length is 1.90 Å. The Cu(1)-N(2) bond length is 1.92 Å. The Cu(1)-O(1) bond length is 2.31 Å. The Cu(1)-O(3) bond length is 2.03 Å. In the second Cu site, Cu(2) is bonded in a bent 150 degrees geometry to two equivalent O(4) atoms. Both Cu(2)-O(4) bond lengths are 1.86 Å. In the third Cu site, Cu(3) is bonded in a bent 150 degrees geometry to two equivalent O(2) atoms. Both Cu(3)-O(2) bond lengths are 1.82 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one H(1) 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(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(1), one N(2), and one H(2) atom. The C(2)-N(2) bond length is 1.35 Å. The C(2)-H(2) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(4), one C(6), and one N(2) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-C(6) bond length is 1.52 Å. The C(3)-N(2) bond length is 1.36 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one N(1) atom. The C(4)-C(5) bond length is 1.50 Å. The C(4)-N(1) bond length is 1.36 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(1), and one O(2) atom. The C(5)-O(1) bond length is 1.25 Å. The C(5)-O(2) bond length is 1.29 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(6)-O(3) bond length is 1.27 Å. The C(6)-O(4) bond length is 1.27 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cu(1), one C(1), and one C(4) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cu(1), one C(2), and one C(3) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Cu(1) and one C(5) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cu(3) and one C(5) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(6) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Cu(2) and one C(6) atom. Linkers: 4 [O]C(=O)c1nccnc1C([O])=O. Metal clusters: 8 [Cu]. The MOF has largest included sphere 4.25 A, density 2.27 g/cm3, surface area 2670.03 m2/g, accessible volume 0.16 cm3/g