MnC12H10(N4O)2 crystallizes in the tetragonal I4_1/a space group. Mn(1) is bonded in an octahedral geometry to two equivalent N(1), two equivalent N(2), and two equivalent O(1) atoms. Both Mn(1)-N(1) bond lengths are 2.28 Å. Both Mn(1)-N(2) bond lengths are 2.25 Å. Both Mn(1)-O(1) bond lengths are 2.20 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(1) atom. The C(1)-N(1) bond length is 1.32 Å. The C(1)-N(2) bond length is 1.36 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one N(2), one N(3), and one N(4) atom. The C(2)-N(2) bond length is 1.36 Å. The C(2)-N(3) bond length is 1.32 Å. The C(2)-N(4) bond length is 1.36 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(4), one C(6), and one N(3) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-C(6) bond length is 1.52 Å. The C(3)-N(3) bond length is 1.35 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3) and one H(2) atom. The C(4)-H(2) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one N(4) and one O(1) atom. The C(5)-N(4) bond length is 1.39 Å. The C(5)-O(1) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a trigonal non-coplanar geometry to one C(3); one H(5); and two equivalent H(3,4) atoms. The C(6)-H(5) bond length is 0.96 Å. Both C(6)-H(3,4) bond lengths are 0.96 Å. There are four inequivalent N sites. In the first N site, N(2) is bonded in a trigonal planar geometry to one Mn(1), one C(1), and one C(2) atom. In the second N site, N(3) is bonded in a bent 120 degrees geometry to one C(2) and one C(3) atom. In the third N site, N(4) is bonded in a distorted trigonal planar geometry to one C(2), one C(5), and one N(1) atom. The N(4)-N(1) bond length is 1.38 Å. In the fourth N site, N(1) is bonded in a 3-coordinate geometry to one Mn(1), one C(1), 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 C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3,4) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(5) atom. Linkers: 12 CC1=Nc2ncnn2C(=O)[CH]1 ,2 Cc1cc(=O)n2c(n1)[N]C=N2 ,1 Cc1cc(=O)n2c(n1)N=C[N]2 ,1 CC1=NC2=[N]=C[N]N2C(=O)[CH]1. Metal clusters: 8 [Mn]. The MOF has largest included sphere 4.32 A, density 1.42 g/cm3, surface area 4239.87 m2/g, accessible volume 0.25 cm3/g