MnC6N2H5O5 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded in an octahedral geometry to one N(1), one O(1), one O(2), one O(3), one O(4), and one O(5) atom. The Mn(1)-N(1) bond length is 2.26 Å. The Mn(1)-O(1) bond length is 2.19 Å. The Mn(1)-O(2) bond length is 2.09 Å. The Mn(1)-O(3) bond length is 2.24 Å. The Mn(1)-O(4) bond length is 2.24 Å. The Mn(1)-O(5) bond length is 2.15 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one H(1) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.35 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(2) atom. The C(2)-H(2) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one N(2) and one H(3) atom. The C(3)-N(2) bond length is 1.34 Å. The C(3)-H(3) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(5), one N(1), and one N(2) atom. The C(4)-C(5) bond length is 1.52 Å. The C(4)-N(1) bond length is 1.35 Å. The C(4)-N(2) bond length is 1.34 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(1), and one O(2) atom. The C(5)-O(1) bond length is 1.27 Å. The C(5)-O(2) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(6)-O(3) bond length is 1.26 Å. The C(6)-O(4) bond length is 1.28 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Mn(1), one C(1), and one C(4) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one C(3), one C(4), and one H(5) atom. The N(2)-H(5) bond length is 1.74 Å. There are five 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. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(5) atom. The H(4)-O(5) bond length is 0.99 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(2) and one O(5) atom. The H(5)-O(5) bond length is 1.01 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(5) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one C(5) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(6) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Mn(1) and one C(6) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one H(4), and one H(5) atom. Linkers: 1 [O]C(=O)C([O])=O. Metal clusters: 4 [Mn]. The MOF has largest included sphere 1.86 A, density 2.03 g/cm3, surface area 3315.10 m2/g, accessible volume 0.10 cm3/g