MnC8H4(N3O)2 crystallizes in the monoclinic C2/c space group. Mn(1) is bonded in an octahedral geometry to two equivalent N(2), two equivalent N(3), and two equivalent O(1) atoms. Both Mn(1)-N(2) bond lengths are 2.27 Å. Both Mn(1)-N(3) bond lengths are 2.23 Å. Both Mn(1)-O(1) bond lengths are 2.15 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(1), and one O(1) atom. The C(1)-C(2) bond length is 1.43 Å. The C(1)-N(1) bond length is 1.31 Å. The C(1)-O(1) bond length is 1.27 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(4) bond length is 1.41 Å. In the third C site, C(3) is bonded in a distorted linear geometry to one C(2) and one N(2) atom. The C(3)-N(2) bond length is 1.15 Å. In the fourth C site, C(4) is bonded in a distorted linear geometry to one C(2) and one N(3) atom. The C(4)-N(3) bond length is 1.15 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one C(1), one H(1), and one H(2) atom. The N(1)-H(1) bond length is 0.87 Å. The N(1)-H(2) bond length is 0.85 Å. In the second N site, N(2) is bonded in a linear geometry to one Mn(1) and one C(3) atom. In the third N site, N(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one C(4) atom. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one N(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one N(1) atom. O(1) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one C(1) atom. Linkers: 4 N#C[C](C#N)C(N)=O. Metal clusters: 2 [Mn]. The MOF has largest included sphere 4.13 A, density 1.26 g/cm3, surface area 4432.13 m2/g, accessible volume 0.32 cm3/g