Cu9(C19O9)4 crystallizes in the cubic Fm-3m space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. All Cu(1)-O(2) bond lengths are 1.84 Å. In the second Cu site, Cu(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(1) atoms. All Cu(2)-O(1) bond lengths are 1.75 Å. There are five inequivalent C sites. In the first C site, C(4) is bonded in a bent 120 degrees geometry to two equivalent C(2) atoms. Both C(4)-C(2) bond lengths are 1.43 Å. In the second C site, C(1) is bonded in a distorted water-like geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.46 Å. The C(1)-O(1) bond length is 1.43 Å. The C(1)-O(2) bond length is 1.32 Å. In the third C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.29 Å. In the fourth C site, C(3) is bonded in a trigonal planar geometry to one C(5) and two equivalent C(2) atoms. The C(3)-C(5) bond length is 1.43 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to three equivalent C(3) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cu(2) and one C(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Cu(1) and two equivalent C(1) atoms. Linkers: 18 O=C1OC(=O)C2=C3[C]4C5=C([C]=C13)C(=O)OC(=O)C5=[C]C1=C4C(=[C]2)C(=O)OC1=O ,14 O=C1OC(=O)c2[c]c3c(=O)oc(=O)c4[c]c5c(=O)oc(=O)c6c5c(c2[C]1[C]=6)c34. Metal clusters: 72 [Cu]. The MOF has largest included sphere 13.56 A, density 1.03 g/cm3, surface area 2600.40 m2/g, accessible volume 0.63 cm3/g