CuC2H4(N4O)2 crystallizes in the triclinic P-1 space group. Cu(1) is bonded in a trigonal bipyramidal geometry to one N(4), one N(6), one N(8), one O(1), and one O(2) atom. The Cu(1)-N(4) bond length is 2.27 Å. The Cu(1)-N(6) bond length is 1.98 Å. The Cu(1)-N(8) bond length is 2.02 Å. The Cu(1)-O(1) bond length is 2.00 Å. The Cu(1)-O(2) bond length is 1.98 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(3), and one N(5) atom. The C(1)-C(2) bond length is 1.45 Å. The C(1)-N(3) bond length is 1.35 Å. The C(1)-N(5) bond length is 1.34 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 N(8) atom. The C(2)-N(2) bond length is 1.34 Å. The C(2)-N(8) bond length is 1.35 Å. There are eight inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one N(3), one N(6), and one H(1) atom. The N(1)-N(3) bond length is 1.33 Å. The N(1)-N(6) bond length is 1.33 Å. The N(1)-H(1) bond length is 1.75 Å. In the second N site, N(2) is bonded in a distorted single-bond geometry to one C(2), one N(7), and one H(2) atom. The N(2)-N(7) bond length is 1.34 Å. The N(2)-H(2) bond length is 1.78 Å. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one C(1), one N(1), and one H(3) atom. The N(3)-H(3) bond length is 1.71 Å. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Cu(1), one N(7), and one N(8) atom. The N(4)-N(7) bond length is 1.32 Å. The N(4)-N(8) bond length is 1.34 Å. In the fifth N site, N(5) is bonded in a distorted water-like geometry to one C(1) and one N(6) atom. The N(5)-N(6) bond length is 1.33 Å. In the sixth N site, N(6) is bonded in a distorted trigonal planar geometry to one Cu(1), one N(1), and one N(5) atom. In the seventh N site, N(7) is bonded in a 3-coordinate geometry to one N(2), one N(4), and one H(4) atom. The N(7)-H(4) bond length is 1.81 Å. In the eighth N site, N(8) is bonded in a distorted trigonal planar geometry to one Cu(1), one C(2), and one N(4) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) and 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 N(2) and one O(1) atom. The H(2)-O(1) bond length is 1.00 Å. In the third H site, H(3) is bonded in a distorted single-bond geometry to one N(3) and one O(2) atom. The H(3)-O(2) bond length is 1.01 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(7) and one O(2) atom. The H(4)-O(2) bond length is 1.00 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one H(3), and one H(4) atom. In the second O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one H(1), and one H(2) atom. Linkers: 1 [N]1N=NC(C2=NN=N[N]2)=N1 ,1 [N]1N=NN=C1C1=NN=N[N]1. Metal clusters: 1 O.O.O.O.[N]1[N][Cu][N][N][Cu]1. The MOF has largest included sphere 1.77 A, density 2.36 g/cm3, surface area 3189.39 m2/g, accessible volume 0.08 cm3/g