CuH10(C5O)5 crystallizes in the trigonal R-3m space group. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cu(1)-O(1) bond lengths are 1.95 Å. Both Cu(1)-O(2) bond lengths are 1.95 Å. There are fourteen 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 1.27 Å. The C(1)-O(2) bond length is 1.26 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 1.37 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. The C(3)-H(1) bond length is 0.95 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(5) and one H(2) atom. The C(4)-C(5) bond length is 1.38 Å. The C(4)-H(2) bond length is 0.95 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(8) atom. The C(5)-C(6) bond length is 1.38 Å. The C(5)-C(8) bond length is 1.50 Å. In the sixth C site, C(13) is bonded in a single-bond geometry to two equivalent C(8) and one O(3) atom. Both C(13)-C(8) bond lengths are 1.40 Å. The C(13)-O(3) bond length is 1.37 Å. In the seventh C site, C(6) is bonded in a distorted single-bond geometry to one C(5), one C(7), and one H(3) atom. The C(6)-C(7) bond length is 1.39 Å. The C(6)-H(3) bond length is 0.95 Å. In the eighth C site, C(7) is bonded in a distorted trigonal planar geometry to one C(2), one C(6), and one H(4) atom. The C(7)-H(4) bond length is 0.95 Å. In the ninth C site, C(8) is bonded in a trigonal planar geometry to one C(13), one C(5), and one C(9) atom. The C(8)-C(9) bond length is 1.38 Å. In the tenth C site, C(9) is bonded in a distorted single-bond geometry to one C(12), one C(8), and one H(5) atom. The C(9)-C(12) bond length is 1.40 Å. The C(9)-H(5) bond length is 0.95 Å. In the eleventh C site, C(10) is bonded in a single-bond geometry to one C(14) atom. The C(10)-C(14) bond length is 1.58 Å. In the twelfth C site, C(11) is bonded in a single-bond geometry to one C(14) atom. The C(11)-C(14) bond length is 1.44 Å. In the thirteenth C site, C(12) is bonded in a trigonal planar geometry to one C(12) and two equivalent C(9) atoms. The C(12)-C(12) bond length is 1.47 Å. In the fourteenth C site, C(14) is bonded in a single-bond geometry to two equivalent C(10), two equivalent C(11), and one O(3) atom. The C(14)-O(3) bond length is 1.36 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(7) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(1) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one C(13) and one C(14) atom. Linkers: 9 [C][C]C1(Oc2c(-c3ccc(C([O])=O)cc3)cc(-c3cc(-c4ccc(C([O])=O)cc4)c(OC4([C][C])[C][C]4)c(-c4ccc(C([O])=O)cc4)c3)cc2-c2ccc(C([O])=O)cc2)[C][C]1. 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 8.72 A, density 0.61 g/cm3, surface area 4672.58 m2/g, accessible volume 1.14 cm3/g