CuH11(C9O2)2 crystallizes in the trigonal R-3m space group. 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 1.95 Å. Both Cu(1)-O(2) bond lengths are 1.95 Å. There are eleven inequivalent C sites. In the first C site, C(8) is bonded in a 5-coordinate geometry to one C(8), two equivalent C(1), and two equivalent C(4) atoms. The C(8)-C(8) bond length is 1.48 Å. Both C(8)-C(1) bond lengths are 1.37 Å. Both C(8)-C(4) bond lengths are 1.32 Å. In the second C site, C(9) is bonded in a 5-coordinate geometry to one C(10), two equivalent C(2), and two equivalent C(3) atoms. The C(9)-C(10) bond length is 1.50 Å. Both C(9)-C(2) bond lengths are 1.40 Å. Both C(9)-C(3) bond lengths are 1.30 Å. In the third C site, C(10) is bonded in a trigonal planar geometry to one C(9) and two equivalent C(5) atoms. Both C(10)-C(5) bond lengths are 1.39 Å. In the fourth C site, C(11) is bonded in a distorted single-bond geometry to two equivalent C(6) and one H(6) atom. Both C(11)-C(6) bond lengths are 1.39 Å. The C(11)-H(6) bond length is 0.95 Å. In the fifth C site, C(1) is bonded in a 4-coordinate geometry to one C(2), one C(4), one C(8), and one H(1) atom. The C(1)-C(2) bond length is 1.35 Å. The C(1)-C(4) bond length is 1.12 Å. The C(1)-H(1) bond length is 0.96 Å. In the sixth C site, C(2) is bonded in a 4-coordinate geometry to one C(1), one C(3), one C(9), and one H(2) atom. The C(2)-C(3) bond length is 1.17 Å. The C(2)-H(2) bond length is 0.95 Å. In the seventh C site, C(3) is bonded in a 4-coordinate geometry to one C(2), one C(4), one C(9), and one H(3) atom. The C(3)-C(4) bond length is 1.42 Å. The C(3)-H(3) bond length is 0.95 Å. In the eighth C site, C(4) is bonded in a 1-coordinate geometry to one C(1), one C(3), one C(8), and one H(4) atom. The C(4)-H(4) bond length is 0.95 Å. In the ninth C site, C(5) is bonded in a single-bond geometry to one C(10), one C(6), and one H(5) atom. The C(5)-C(6) bond length is 1.39 Å. The C(5)-H(5) bond length is 0.95 Å. In the tenth C site, C(6) is bonded in a trigonal planar geometry to one C(11), one C(5), and one C(7) atom. The C(6)-C(7) bond length is 1.47 Å. In the eleventh C site, C(7) is bonded in a bent 120 degrees geometry to one C(6), one O(1), and one O(2) atom. The C(7)-O(1) bond length is 1.26 Å. The C(7)-O(2) bond length is 1.26 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(4) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(5) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(11) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(7) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one C(7) atom. Linkers: 8 [C@H]12[C@@H]3[C@@H]4[C@H]1C41[C@@H]4[C@H]5[C@@H]([C@@H]41)C235.[C@H]12[C@@H]3[C@@H]4[C@H]1C41[C@@H]4[C@H]5[C@@H]([C@@H]41)C235.[O]C(=O)c1c[c]cc(C([O])=O)c1.[O]C(=O)c1c[c]cc(C([O])=O)c1 ,2 [C@H]12[C@@H]3[C@@H]4[C@H]1C41[C@@H]4[C@H]5[C@@H]([C@@H]41)C235.[C@H]12[C@@H]3[C@@H]4[C@H]1C41[C@H]4[C@@H]5[C@H]([C@H]41)C235.[O]C(=O)c1c[c]cc(C([O])=O)c1.[O]C(=O)c1c[c]cc(C([O])=O)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 12.64 A, density 0.69 g/cm3, surface area 3585.55 m2/g, accessible volume 0.99 cm3/g