ZnH4(CO2)4(CH2)2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure consists of eight 02329_fluka molecules inside a ZnH4(CO2)4 framework. In the ZnH4(CO2)4 framework, Zn(1) is bonded to one O(1), one O(3), one O(4), one O(8), and two equivalent O(2) atoms to form corner-sharing ZnO6 octahedra. The corner-sharing octahedral tilt angles are 67°. The Zn(1)-O(1) bond length is 2.05 Å. The Zn(1)-O(3) bond length is 2.09 Å. The Zn(1)-O(4) bond length is 2.16 Å. The Zn(1)-O(8) bond length is 2.08 Å. There is one shorter (2.05 Å) and one longer (2.38 Å) Zn(1)-O(2) bond length. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one O(1) atom. The C(1)-O(1) bond length is 1.43 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(3) atom. The C(2)-O(2) bond length is 1.28 Å. The C(2)-O(3) bond length is 1.26 Å. In the third C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(5) atom. The C(4)-O(4) bond length is 1.28 Å. The C(4)-O(5) bond length is 1.28 Å. In the fourth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(6) and one O(7) atom. The C(6)-O(6) bond length is 1.32 Å. The C(6)-O(7) bond length is 1.24 Å. There are four inequivalent H sites. In the first H site, H(8) is bonded in a linear geometry to one O(5) and one O(6) atom. The H(8)-O(5) bond length is 1.59 Å. The H(8)-O(6) bond length is 1.02 Å. In the second H site, H(5) is bonded in a single-bond geometry to one O(8) atom. The H(5)-O(8) bond length is 0.99 Å. In the third H site, H(6) is bonded in a linear geometry to one O(1) and one O(5) atom. The H(6)-O(1) bond length is 1.02 Å. The H(6)-O(5) bond length is 1.56 Å. In the fourth H site, H(7) is bonded in a single-bond geometry to one O(8) atom. The H(7)-O(8) bond length is 0.99 Å. There are eight inequivalent O sites. In the first O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Zn(1) and one C(2) atom. In the second O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Zn(1) and one C(2) atom. In the third O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one C(4) atom. In the fourth O site, O(5) is bonded in a trigonal planar geometry to one C(4), one H(6), and one H(8) atom. In the fifth O site, O(1) is bonded in a distorted trigonal planar geometry to one Zn(1), one C(1), and one H(6) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one C(6) and one H(8) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one C(6) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one H(5), and one H(7) atom. Linkers: 4 [O]C(=O)CC(O)(CC(=O)O)C([O])=O. Metal clusters: 4 [Zn]. The MOF has largest included sphere 1.92 A, density 2.21 g/cm3, surface area 3153.08 m2/g, accessible volume 0.10 cm3/g