MnC11N2H9O5 crystallizes in the tetragonal I4_122 space group. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing MnO6 octahedra. The corner-sharing octahedral tilt angles are 73°. Both Mn(1)-O(1) bond lengths are 2.16 Å. Both Mn(1)-O(2) bond lengths are 2.08 Å. Both Mn(1)-O(3) bond lengths are 2.35 Å. There are seven inequivalent C sites. In the first C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(2) atom. The C(3)-C(2) bond length is 1.40 Å. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(2) bond length is 1.09 Å. In the second C site, C(4) is bonded in a trigonal planar geometry to one C(4) and two equivalent C(3) atoms. The C(4)-C(4) bond length is 1.48 Å. In the third C site, C(5) is bonded in a distorted trigonal planar geometry to two equivalent C(2) and one H(3) atom. Both C(5)-C(2) bond lengths are 1.40 Å. The C(5)-H(3) bond length is 1.09 Å. In the fourth C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.51 Å. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(2) bond length is 1.27 Å. In the fifth C site, C(6) is bonded in a trigonal planar geometry to two equivalent N(1) and one O(3) atom. Both C(6)-N(1) bond lengths are 1.35 Å. The C(6)-O(3) bond length is 1.28 Å. In the sixth C site, C(7) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(4), and one H(5) atom. The C(7)-N(1) bond length is 1.46 Å. The C(7)-H(4) bond length is 1.10 Å. The C(7)-H(5) bond length is 1.10 Å. In the seventh C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(5) atom. N(1) is bonded in a trigonal planar geometry to one C(6), one C(7), and one H(1) atom. The N(1)-H(1) bond length is 1.02 Å. There are five inequivalent H sites. In the first H site, H(5) is bonded in a single-bond geometry to one C(7) atom. In the second H site, H(1) is bonded in a single-bond geometry to one N(1) atom. In the third H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(4) is bonded in a single-bond geometry to one C(7) atom. There are three inequivalent O sites. In the first O site, O(2) is bonded in a bent 150 degrees geometry to one Mn(1) and one C(1) atom. In the second O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Mn(1) and one C(6) atom. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one C(1) atom. Linkers: 2 [O]C(=O)c1cc(C([O])=O)cc(-c2cc(C([O])=O)cc(C([O])=O)c2)c1. Metal clusters: 4 [Mn]. The MOF has largest included sphere 6.42 A, density 1.34 g/cm3, surface area 3237.88 m2/g, accessible volume 0.26 cm3/g