CoH4(CO2)3CH2 crystallizes in the orthorhombic P2_12_12_1 space group. The structure consists of four 02329_fluka molecules inside a CoH4(CO2)3 framework. In the CoH4(CO2)3 framework, Co(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The Co(1)-O(1) bond length is 2.02 Å. The Co(1)-O(2) bond length is 2.08 Å. The Co(1)-O(3) bond length is 2.23 Å. The Co(1)-O(4) bond length is 2.08 Å. The Co(1)-O(5) bond length is 2.11 Å. The Co(1)-O(6) bond length is 2.06 Å. There are three inequivalent C sites. In the first C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(2)-O(1) bond length is 1.27 Å. The C(2)-O(2) bond length is 1.27 Å. In the second C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(6) atom. The C(3)-O(4) bond length is 1.28 Å. The C(3)-O(6) bond length is 1.26 Å. In the third C site, C(1) is bonded in a distorted water-like geometry to one H(4) and one O(5) atom. The C(1)-H(4) bond length is 1.10 Å. The C(1)-O(5) bond length is 1.43 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) and one O(3) atom. The H(1)-O(2) bond length is 1.73 Å. The H(1)-O(3) bond length is 1.00 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(3) atom. The H(2)-O(3) bond length is 1.00 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(5) atom. The H(3)-O(5) bond length is 1.00 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(1) atom. There are six inequivalent O sites. In the first O site, O(6) is bonded in a bent 120 degrees geometry to one Co(1) and one C(3) atom. In the second O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(2) atom. In the third O site, O(5) is bonded in a 3-coordinate geometry to one Co(1), one C(1), and one H(3) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Co(1), one C(2), and one H(1) atom. In the fifth O site, O(3) is bonded in a distorted water-like geometry to one Co(1), one H(1), and one H(2) atom. In the sixth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(3) atom. Linkers: 4 [O]C(=O)C[C@H](O)C([O])=O. Metal clusters: 4 [Co]. The MOF has largest included sphere 1.85 A, density 2.27 g/cm3, surface area 2583.40 m2/g, accessible volume 0.04 cm3/g