CuH2(C3O2)2 crystallizes in the cubic Fm-3c space group. There are three inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted rectangular see-saw-like geometry to one O(3), one O(4), one O(7), and one O(8) atom. The Cu(1)-O(3) bond length is 1.97 Å. The Cu(1)-O(4) bond length is 1.95 Å. The Cu(1)-O(7) bond length is 1.97 Å. The Cu(1)-O(8) bond length is 1.95 Å. In the second Cu site, Cu(2) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(6) atoms. Both Cu(2)-O(1) bond lengths are 1.95 Å. Both Cu(2)-O(6) bond lengths are 1.95 Å. In the third Cu site, Cu(3) is bonded in a distorted square co-planar geometry to two equivalent O(2) and two equivalent O(5) atoms. Both Cu(3)-O(2) bond lengths are 1.96 Å. Both Cu(3)-O(5) bond lengths are 1.95 Å. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.50 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.24 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(3) bond length is 1.38 Å. The C(2)-C(7) bond length is 1.40 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(1) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(1) bond length is 0.95 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(8) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-C(8) bond length is 1.50 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4), one C(6), and one H(2) atom. The C(5)-C(6) bond length is 1.38 Å. The C(5)-H(2) bond length is 0.95 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(5), one C(7), and one C(9) atom. The C(6)-C(7) bond length is 1.41 Å. The C(6)-C(9) bond length is 1.50 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one H(3) atom. The C(7)-H(3) bond length is 0.95 Å. In the eighth C site, C(8) is bonded in a bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.25 Å. The C(8)-O(4) bond length is 1.26 Å. In the ninth C site, C(9) is bonded in a bent 120 degrees geometry to one C(6), one O(5), and one O(6) atom. The C(9)-O(5) bond length is 1.24 Å. The C(9)-O(6) bond length is 1.26 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(11), one O(7), and one O(8) atom. The C(10)-C(11) bond length is 1.49 Å. The C(10)-O(7) bond length is 1.24 Å. The C(10)-O(8) bond length is 1.24 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(10) and two equivalent C(12) atoms. There is one shorter (1.39 Å) and one longer (1.41 Å) C(11)-C(12) bond length. In the twelfth C site, C(12) is bonded in a distorted single-bond geometry to two equivalent C(11) and one H(4) atom. The C(12)-H(4) bond length is 0.95 Å. There are four inequivalent H sites. In the first H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(1) 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(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(12) atom. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Cu(3) and one C(9) atom. In the second O site, O(7) is bonded in a distorted single-bond geometry to one Cu(1) and one C(10) atom. In the third O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(10) atom. In the fourth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Cu(2) and one C(9) atom. In the fifth O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cu(2) and one C(1) atom. In the sixth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cu(3) and one C(1) atom. In the seventh O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(8) atom. In the eighth O site, O(4) is bonded in a distorted single-bond geometry to one Cu(1) and one C(8) atom. Linkers: 256 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 192 [C]1O[Cu]234O[C]O[Cu]2(O1)(O[C]O3)O[C]O4. RCSR code: tbo. The MOF has largest included sphere 13.14 A, density 0.89 g/cm3, surface area 3167.55 m2/g, accessible volume 0.87 cm3/g