CuH5(C3O)4CH crystallizes in the trigonal R-3m space group. The structure consists of eighteen 02329_fluka molecules inside a CuH5(C3O)4 framework. In the CuH5(C3O)4 framework, Cu(1) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cu(1)-O(1) bond lengths are 1.96 Å. Both Cu(1)-O(2) bond lengths are 1.94 Å. There are nine inequivalent C sites. In the first C site, C(3) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(3)-C(2) bond length is 1.48 Å. The C(3)-O(1) bond length is 1.25 Å. The C(3)-O(2) bond length is 1.25 Å. In the second C site, C(4) is bonded in a trigonal planar geometry to one C(4), one C(5), and one C(9) atom. The C(4)-C(4) bond length is 1.39 Å. The C(4)-C(5) bond length is 1.36 Å. The C(4)-C(9) bond length is 1.38 Å. In the third C site, C(5) is bonded in a trigonal planar geometry to one C(10), one C(4), and one C(6) atom. The C(5)-C(10) bond length is 1.52 Å. The C(5)-C(6) bond length is 1.36 Å. In the fourth C site, C(6) is bonded in a distorted single-bond geometry to one C(5) and one H(2) atom. The C(6)-H(2) bond length is 0.93 Å. In the fifth C site, C(8) is bonded in a distorted single-bond geometry to two equivalent C(2) and one H(4) atom. Both C(8)-C(2) bond lengths are 1.38 Å. The C(8)-H(4) bond length is 0.93 Å. In the sixth C site, C(9) is bonded in a distorted single-bond geometry to one C(4) and one H(5) atom. The C(9)-H(5) bond length is 0.93 Å. In the seventh C site, C(10) is bonded in a trigonal planar geometry to one C(5) and two equivalent C(1) atoms. Both C(10)-C(1) bond lengths are 1.38 Å. In the eighth C site, C(1) is bonded in a distorted single-bond geometry to one C(10), one C(2), and one H(1) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-H(1) bond length is 0.93 Å. In the ninth C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(8) atom. There are four inequivalent H sites. In the first H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the second H site, H(4) is bonded in a single-bond geometry to one C(8) atom. In the third H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the fourth H site, H(2) is bonded in a single-bond geometry to one C(6) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cu(1) and one C(3) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(3) atom. Linkers: 9 [O]C(=O)c1cc(C([O])=O)cc(-c2cccc3c(-c4cc(C([O])=O)cc(C([O])=O)c4)cccc23)c1. Metal clusters: 9 [C]1O[Cu]234O[C]O[Cu]2(O1)(O[C]O3)O[C]O4. RCSR code: nbo. The MOF has largest included sphere 11.64 A, density 0.73 g/cm3, surface area 3914.40 m2/g, accessible volume 1.06 cm3/g