ZnC2H4(N4O)2 crystallizes in the monoclinic C2/c space group. Zn(1) is bonded in an octahedral geometry to two equivalent N(1), two equivalent N(3), and two equivalent O(1) atoms. Both Zn(1)-N(1) bond lengths are 2.12 Å. Both Zn(1)-N(3) bond lengths are 2.31 Å. Both Zn(1)-O(1) bond lengths are 2.07 Å. C(1) is bonded in a distorted trigonal planar geometry to one C(1), one N(3), and one N(4) atom. The C(1)-C(1) bond length is 1.44 Å. The C(1)-N(3) bond length is 1.34 Å. The C(1)-N(4) bond length is 1.34 Å. There are four inequivalent N sites. In the first N site, N(2) is bonded in a 3-coordinate geometry to one N(1), one N(4), and one H(1) atom. The N(2)-N(1) bond length is 1.32 Å. The N(2)-N(4) bond length is 1.34 Å. The N(2)-H(1) bond length is 1.84 Å. In the second N site, N(3) is bonded in a 3-coordinate geometry to one Zn(1), one C(1), and one N(1) atom. The N(3)-N(1) bond length is 1.34 Å. In the third N site, N(4) is bonded in a distorted single-bond geometry to one C(1), one N(2), and one H(2) atom. The N(4)-H(2) bond length is 1.77 Å. In the fourth N site, N(1) is bonded in a distorted trigonal planar geometry to one Zn(1), one N(2), and one N(3) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(2) and one O(1) atom. The H(1)-O(1) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one N(4) and one O(1) atom. The H(2)-O(1) bond length is 1.00 Å. O(1) is bonded in a distorted trigonal planar geometry to one Zn(1), one H(1), and one H(2) atom. Linkers: 1 [N]1N=NN=C1C1=NN=N[N]1. Metal clusters: 2 [Zn]. The MOF has largest included sphere 1.58 A, density 2.30 g/cm3, surface area 3290.20 m2/g, accessible volume 0.05 cm3/g