Zn11H18(C3O2)18 crystallizes in the cubic Pm-3m space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted square co-planar geometry to four equivalent O(3) atoms. All Zn(1)-O(3) bond lengths are 2.02 Å. In the second Zn site, Zn(2) is bonded in a trigonal non-coplanar geometry to three equivalent O(1) atoms. All Zn(2)-O(1) bond lengths are 1.89 Å. In the third Zn site, Zn(3) is bonded in a trigonal non-coplanar geometry to three equivalent O(2) atoms. All Zn(3)-O(2) bond lengths are 1.94 Å. There are six inequivalent C sites. In the first C site, C(4) is bonded in a distorted single-bond geometry to two equivalent C(1) and one H(2) atom. Both C(4)-C(1) bond lengths are 1.36 Å. The C(4)-H(2) bond length is 0.93 Å. In the second C site, C(5) is bonded in a trigonal planar geometry to one C(6) and two equivalent C(3) atoms. The C(5)-C(6) bond length is 1.52 Å. Both C(5)-C(3) bond lengths are 1.39 Å. In the third C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5) and two equivalent O(3) atoms. Both C(6)-O(3) bond lengths are 1.26 Å. In the fourth C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(4) atom. The C(1)-C(2) bond length is 1.49 Å. The C(1)-C(3) bond length is 1.37 Å. In the fifth C site, C(2) is bonded in a bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(2)-O(1) bond length is 1.25 Å. The C(2)-O(2) bond length is 1.24 Å. In the sixth C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one H(1) atom. The C(3)-H(1) bond length is 0.93 Å. There are two inequivalent H sites. In the first H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the second H site, H(1) is bonded in a single-bond geometry to one C(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Zn(2) and one C(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Zn(3) and one C(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one C(6) atom. Linkers: 12 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 3 [C]1O[Zn]23O[C]O[Zn](O1)(O[C]O2)O[C]O3 ,8 [C]1O[Zn]2O[C]O[Zn](O1)O[C]O2. RCSR code: tfe. The MOF has largest included sphere 14.05 A, density 0.76 g/cm3, surface area 3362.34 m2/g, accessible volume 0.93 cm3/g