CoH4(CO3)2(CH)2 crystallizes in the triclinic P1 space group. The structure consists of four 02329_fluka molecules inside a CoH4(CO3)2 framework. In the CoH4(CO3)2 framework, there are two inequivalent Co sites. In the first Co site, Co(1) is bonded in an octahedral geometry to one O(1), one O(11), one O(4), one O(5), one O(8), and one O(9) atom. The Co(1)-O(1) bond length is 2.10 Å. The Co(1)-O(11) bond length is 2.20 Å. The Co(1)-O(4) bond length is 2.08 Å. The Co(1)-O(5) bond length is 2.06 Å. The Co(1)-O(8) bond length is 2.07 Å. The Co(1)-O(9) bond length is 2.07 Å. In the second Co site, Co(2) is bonded in an octahedral geometry to one O(10), one O(12), one O(2), one O(3), one O(6), and one O(7) atom. The Co(2)-O(10) bond length is 2.09 Å. The Co(2)-O(12) bond length is 2.21 Å. The Co(2)-O(2) bond length is 2.09 Å. The Co(2)-O(3) bond length is 2.08 Å. The Co(2)-O(6) bond length is 2.07 Å. The Co(2)-O(7) bond length is 2.08 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(3) bond length is 1.28 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(4) atom. The C(2)-O(2) bond length is 1.28 Å. The C(2)-O(4) bond length is 1.27 Å. In the third C site, C(7) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(7) atom. The C(7)-O(5) bond length is 1.28 Å. The C(7)-O(7) bond length is 1.28 Å. In the fourth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(6) and one O(8) atom. The C(8)-O(6) bond length is 1.28 Å. The C(8)-O(8) bond length is 1.28 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(11) atom. The H(1)-O(11) bond length is 1.00 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(12) atom. The H(2)-O(12) bond length is 1.00 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(11) atom. The H(3)-O(11) bond length is 0.98 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(12) atom. The H(4)-O(12) bond length is 0.98 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(7) and one O(9) atom. The H(5)-O(7) bond length is 1.76 Å. The H(5)-O(9) bond length is 0.99 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(10) atom. The H(6)-O(10) bond length is 0.99 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(2) and one O(9) atom. The H(7)-O(2) bond length is 1.69 Å. The H(7)-O(9) bond length is 1.00 Å. In the eighth H site, H(8) is bonded in a single-bond geometry to one O(1) and one O(10) atom. The H(8)-O(1) bond length is 1.69 Å. The H(8)-O(10) bond length is 1.00 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(1), one C(1), and one H(8) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(2), one C(2), and one H(7) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(2) and one C(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Co(1) and one C(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(7) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one C(8) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Co(2), one C(7), and one H(5) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one C(8) atom. In the ninth O site, O(9) is bonded in a distorted water-like geometry to one Co(1), one H(5), and one H(7) atom. In the tenth O site, O(10) is bonded in a distorted water-like geometry to one Co(2), one H(6), and one H(8) atom. In the eleventh O site, O(11) is bonded in a distorted water-like geometry to one Co(1), one H(1), and one H(3) atom. In the twelfth O site, O(12) is bonded in a distorted water-like geometry to one Co(2), one H(2), and one H(4) atom. Linkers: 2 [O]C(=O)/C=C\C([O])=O. Metal clusters: 2 [Co]. RCSR code: ths. The MOF has largest included sphere 1.97 A, density 2.08 g/cm3, surface area 2912.43 m2/g, accessible volume 0.07 cm3/g