MnH4(C5O2)2(CH)2 crystallizes in the monoclinic P2_1/c space group. The structure consists of eight 02329_fluka molecules inside a MnH4(C5O2)2 framework. In the MnH4(C5O2)2 framework, Mn(1) is bonded in a trigonal pyramidal geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Mn(1)-O(1) bond length is 2.10 Å. The Mn(1)-O(2) bond length is 2.14 Å. The Mn(1)-O(3) bond length is 2.10 Å. The Mn(1)-O(4) bond length is 2.13 Å. There are ten inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(7) atom. The C(1)-C(2) bond length is 1.42 Å. The C(1)-C(6) bond length is 1.43 Å. The C(1)-C(7) bond length is 1.43 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(8) atom. The C(2)-C(5) bond length is 1.51 Å. The C(2)-C(8) bond length is 1.38 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(10), one C(4), and one C(6) atom. The C(3)-C(10) bond length is 1.51 Å. The C(3)-C(4) bond length is 1.37 Å. The C(3)-C(6) bond length is 1.43 Å. In the fourth C site, C(4) is bonded in a single-bond geometry to one C(3) and one H(1) atom. The C(4)-H(1) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(2), and one O(4) atom. The C(5)-O(2) bond length is 1.26 Å. The C(5)-O(4) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(9) atom. The C(6)-C(9) bond length is 1.42 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(1) and one H(2) atom. The C(7)-H(2) bond length is 0.93 Å. In the eighth C site, C(8) is bonded in a single-bond geometry to one C(2) and one H(3) atom. The C(8)-H(3) bond length is 0.93 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(6) and one H(4) atom. The C(9)-H(4) bond length is 0.93 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(3) atom. The C(10)-O(1) bond length is 1.25 Å. The C(10)-O(3) bond length is 1.27 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(7) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(8) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(9) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one C(10) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Mn(1) and one C(5) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one C(10) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one C(5) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)c2ccccc12. Metal clusters: 4 [Mn]. The MOF has largest included sphere 4.05 A, density 1.23 g/cm3, surface area 4200.34 m2/g, accessible volume 0.39 cm3/g