MnC4H4(N4O)2 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded in an octahedral geometry to two equivalent N(1), two equivalent N(4), and two equivalent O(1) atoms. Both Mn(1)-N(1) bond lengths are 2.13 Å. Both Mn(1)-N(4) bond lengths are 2.20 Å. Both Mn(1)-O(1) bond lengths are 2.14 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 H(1) atom. The C(1)-C(2) bond length is 1.37 Å. The C(1)-N(3) bond length is 1.36 Å. The C(1)-H(1) bond length is 1.08 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(1), one N(3), and one H(2) atom. The C(2)-N(3) bond length is 1.36 Å. The C(2)-H(2) bond length is 1.09 Å. There are four inequivalent N sites. In the first N site, N(1) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one N(2) atom. The N(1)-N(2) bond length is 1.19 Å. In the second N site, N(2) is bonded in a linear geometry to one N(1) and one N(4) atom. The N(2)-N(4) bond length is 1.18 Å. In the third N site, N(3) is bonded in a trigonal planar geometry to one C(1), one C(2), and one O(1) atom. The N(3)-O(1) bond length is 1.32 Å. In the fourth N site, N(4) is bonded in a bent 120 degrees geometry to one Mn(1) and one N(2) 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. O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one N(3) atom. Linkers: 2 [O-][n+]1cc[n+]([O-])cc1. Metal clusters: 2 [Mn]. The MOF has largest included sphere 1.55 A, density 2.04 g/cm3, surface area 3409.24 m2/g, accessible volume 0.07 cm3/g