MnC9NH8O3N(CH3)2 crystallizes in the trigonal P3_221 space group. The structure consists of six dimethylamine molecules inside a MnC9NH8O3 framework. In the MnC9NH8O3 framework, Mn(1) is bonded to one N(1), one O(3), two equivalent O(1), and two equivalent O(2) atoms to form MnNO5 octahedra that share  a cornercorner with one C(8)H3N tetrahedra and edges with two equivalent Mn(1)NO5 octahedra. The Mn(1)-N(1) bond length is 1.92 Å. The Mn(1)-O(3) bond length is 2.11 Å. There is one shorter (2.00 Å) and one longer (2.10 Å) Mn(1)-O(1) bond length. Both Mn(1)-O(2) bond lengths are 2.20 Å. There are nine inequivalent C sites. In the first C site, C(8) is bonded to one N(1), one H(4), one H(5), and one H(6) atom to form CH3N tetrahedra that share  a cornercorner with one Mn(1)NO5 octahedra. The corner-sharing octahedral tilt angles are 59°. The C(8)-N(1) bond length is 1.45 Å. The C(8)-H(4) bond length is 1.10 Å. The C(8)-H(5) bond length is 1.11 Å. The C(8)-H(6) bond length is 1.09 Å. In the second C site, C(9) is bonded in a distorted trigonal non-coplanar geometry to one N(1), one H(7), and one H(8) atom. The C(9)-N(1) bond length is 1.45 Å. The C(9)-H(7) bond length is 1.11 Å. The C(9)-H(8) bond length is 1.10 Å. In the third C site, C(1) is bonded in a distorted single-bond geometry to one C(2) and one O(1) atom. The C(1)-C(2) bond length is 1.42 Å. The C(1)-O(1) bond length is 1.35 Å. In the fourth C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(3) bond length is 1.41 Å. The C(2)-C(7) bond length is 1.49 Å. In the fifth C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(3) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(3) bond length is 1.09 Å. In the sixth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(4), and one C(5) atom. The C(4)-C(4) bond length is 1.47 Å. The C(4)-C(5) bond length is 1.41 Å. In the seventh C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one C(6), and one H(1) atom. The C(5)-C(6) bond length is 1.38 Å. The C(5)-H(1) bond length is 1.09 Å. In the eighth C site, C(6) is bonded in a distorted single-bond geometry to one C(5) and one H(2) atom. The C(6)-H(2) bond length is 1.09 Å. In the ninth C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(2), and one O(3) atom. The C(7)-O(2) bond length is 1.29 Å. The C(7)-O(3) bond length is 1.27 Å. N(1) is bonded in a trigonal planar geometry to one Mn(1), one C(8), and one C(9) atom. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(6) 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 C(8) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(8) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(8) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(9) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(9) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mn(1) and one C(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one C(7) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one C(7) atom. Linkers: 3 [O]C(=O)c1cc(-c2ccc([O])c(C([O])=O)c2)ccc1[O]. Metal clusters: 6 [Mn]. The MOF has largest included sphere 11.47 A, density 0.98 g/cm3, surface area 4267.96 m2/g, accessible volume 0.56 cm3/g