CuC4NH7O5 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded in a trigonal bipyramidal geometry to one N(1), one O(1), one O(3), one O(4), and one O(5) atom. The Cu(1)-N(1) bond length is 2.05 Å. The Cu(1)-O(1) bond length is 1.97 Å. The Cu(1)-O(3) bond length is 2.33 Å. The Cu(1)-O(4) bond length is 1.97 Å. The Cu(1)-O(5) bond length is 1.99 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(4), and one H(5) atom. The C(1)-N(1) bond length is 1.48 Å. The C(1)-H(4) bond length is 1.10 Å. The C(1)-H(5) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(2)-O(1) bond length is 1.30 Å. The C(2)-O(2) bond length is 1.26 Å. In the third C site, C(3) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(6), and one H(7) atom. The C(3)-N(1) bond length is 1.48 Å. The C(3)-H(6) bond length is 1.10 Å. The C(3)-H(7) bond length is 1.10 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(4)-O(3) bond length is 1.25 Å. The C(4)-O(4) bond length is 1.29 Å. N(1) is bonded in a distorted tetrahedral geometry to one Cu(1), one C(1), one C(3), and one H(3) atom. The N(1)-H(3) bond length is 1.04 Å. There are seven inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) and one O(5) atom. The H(1)-O(1) bond length is 1.73 Å. The H(1)-O(5) bond length is 0.99 Å. In the second H site, H(2) is bonded in a distorted linear geometry to one O(2) and one O(5) atom. The H(2)-O(2) bond length is 1.63 Å. The H(2)-O(5) bond length is 1.01 Å. In the third H site, H(3) is bonded in a single-bond geometry to one N(1) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(1) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(1) atom. In the sixth H site, H(6) is bonded in a 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. There are five inequivalent O sites. In the first O site, O(4) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(4) atom. In the second O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one H(1), and one H(2) atom. In the third O site, O(3) is bonded in a distorted water-like geometry to one Cu(1) and one C(4) atom. In the fourth O site, O(1) is bonded in a 3-coordinate geometry to one Cu(1), one C(2), and one H(1) atom. In the fifth O site, O(2) is bonded in a bent 120 degrees geometry to one C(2) and one H(2) atom. Linkers: 4 [O]C(=O)CNCC([O])=O. Metal clusters: 4 [Cu]. The MOF has largest included sphere 1.71 A, density 2.14 g/cm3, surface area 3333.86 m2/g, accessible volume 0.10 cm3/g