FeH4(C5O2)2(CH)2 crystallizes in the monoclinic P2_1/c space group. The structure consists of eight 02329_fluka molecules inside a FeH4(C5O2)2 framework. In the FeH4(C5O2)2 framework, Fe(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form edge-sharing FeO6 octahedra. The Fe(1)-O(2) bond length is 2.08 Å. The Fe(1)-O(3) bond length is 2.06 Å. There is one shorter (2.10 Å) and one longer (2.21 Å) Fe(1)-O(1) bond length. There is one shorter (2.12 Å) and one longer (2.21 Å) Fe(1)-O(4) bond length. There are ten inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(11), one C(2), and one C(9) atom. The C(1)-C(11) bond length is 1.49 Å. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(9) bond length is 1.43 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(1) atom. The C(2)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(4) and one H(2) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-H(2) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(3) atom. The C(4)-C(10) bond length is 1.43 Å. The C(4)-C(12) bond length is 1.49 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(10) and one H(3) atom. The C(5)-C(10) bond length is 1.42 Å. The C(5)-H(3) bond length is 1.09 Å. In the sixth C site, C(8) is bonded in a distorted single-bond geometry to one C(9) and one H(6) atom. The C(8)-C(9) bond length is 1.42 Å. The C(8)-H(6) bond length is 1.09 Å. In the seventh C site, C(9) is bonded in a trigonal planar geometry to one C(1), one C(10), and one C(8) atom. The C(9)-C(10) bond length is 1.44 Å. In the eighth C site, C(10) is bonded in a trigonal planar geometry to one C(4), one C(5), and one C(9) atom. In the ninth C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(11)-O(1) bond length is 1.29 Å. The C(11)-O(2) bond length is 1.27 Å. In the tenth C site, C(12) is bonded in a bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(12)-O(3) bond length is 1.27 Å. The C(12)-O(4) bond length is 1.29 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one C(8) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Fe(1) and one C(11) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(11) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Fe(1) and one C(12) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to two equivalent Fe(1) and one C(12) atom. Linkers: 4 [O][C]c1ccc(C([O])=O)c2ccccc12 ,4 [O]C(=O)c1ccc(C([O])=O)c2ccccc12. Metal clusters: 4 [Fe]. The MOF has largest included sphere 2.14 A, density 1.89 g/cm3, surface area 3343.13 m2/g, accessible volume 0.07 cm3/g