KZnC3O7(C4H5)3 crystallizes in the monoclinic C2/c space group. The structure consists of eight hexamethylbenzene molecules inside a KZnC3O7 framework. In the KZnC3O7 framework, K(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and two equivalent O(3) atoms. The K(1)-O(1) bond length is 3.05 Å. The K(1)-O(5) bond length is 2.75 Å. The K(1)-O(6) bond length is 2.76 Å. The K(1)-O(7) bond length is 2.98 Å. There is one shorter (2.84 Å) and one longer (2.88 Å) K(1)-O(3) bond length. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted tetrahedral geometry to two equivalent O(4) and two equivalent O(5) atoms. Both Zn(1)-O(4) bond lengths are 1.96 Å. Both Zn(1)-O(5) bond lengths are 1.97 Å. In the second Zn site, Zn(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(6) atoms. Both Zn(2)-O(1) bond lengths are 2.08 Å. Both Zn(2)-O(6) bond lengths are 2.14 Å. There are three inequivalent C sites. In the first C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(5)-O(1) bond length is 1.26 Å. The C(5)-O(2) bond length is 1.24 Å. In the second C site, C(13) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(13)-O(3) bond length is 1.20 Å. The C(13)-O(4) bond length is 1.29 Å. In the third C site, C(14) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(7) atom. The C(14)-O(5) bond length is 1.26 Å. The C(14)-O(7) bond length is 1.24 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Zn(2), and one C(5) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(5) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent K(1) and one C(13) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(13) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one K(1), one Zn(1), and one C(14) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one K(1) and one Zn(2) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one K(1) and one C(14) atom. Linkers: 8 Cc1c(CC([O])=O)c(C)c(CC([O])=O)c(C)c1CC([O])=O. Metal clusters: 8 [K] ,8 [Zn]. The MOF has largest included sphere 4.08 A, density 1.35 g/cm3, surface area 3733.07 m2/g, accessible volume 0.24 cm3/g