MnC4NH5O4 crystallizes in the orthorhombic Pbca space group. Mn(1) is bonded to one N(1), one O(1), one O(2), one O(3), and two equivalent O(4) atoms to form distorted edge-sharing MnNO5 octahedra. The Mn(1)-N(1) bond length is 2.32 Å. The Mn(1)-O(1) bond length is 2.16 Å. The Mn(1)-O(2) bond length is 2.13 Å. The Mn(1)-O(3) bond length is 2.13 Å. There is one shorter (2.16 Å) and one longer (2.29 Å) Mn(1)-O(4) bond length. There are four inequivalent C sites. In the first C site, C(3) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(4), and one H(5) atom. The C(3)-N(1) bond length is 1.47 Å. The C(3)-H(4) bond length is 1.10 Å. The C(3)-H(5) bond length is 1.10 Å. In the second C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(4)-O(3) bond length is 1.25 Å. The C(4)-O(4) bond length is 1.29 Å. In the third C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.27 Å. In the fourth C site, C(2) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(2), and one H(3) atom. The C(2)-N(1) bond length is 1.47 Å. The C(2)-H(2) bond length is 1.10 Å. The C(2)-H(3) bond length is 1.10 Å. N(1) is bonded in a 4-coordinate geometry to one Mn(1), one C(2), one C(3), and one H(1) atom. The N(1)-H(1) bond length is 1.03 Å. There are five inequivalent H sites. In the first H site, H(4) is bonded in a single-bond geometry to one C(3) 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(5) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the fifth H site, H(3) is bonded in a single-bond geometry to one C(2) atom. There are four inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one C(1) atom. In the second O site, O(3) is bonded in a bent 150 degrees geometry to one Mn(1) and one C(4) atom. In the third O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one C(4) atom. In the fourth O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(1) atom. Linkers: 8 [O]C(=O)CNCC([O])=O. Metal clusters: 8 [Mn]. The MOF has largest included sphere 2.09 A, density 2.08 g/cm3, surface area 3078.10 m2/g, accessible volume 0.07 cm3/g