KH5(C3O4)2(CH)4(C4H3)2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of eight 02329_fluka molecules, four isobutylene molecules, and one KH5(C3O4)2 cluster. In the KH5(C3O4)2 cluster, K(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. The K(1)-O(1) bond length is 2.68 Å. The K(1)-O(2) bond length is 2.87 Å. The K(1)-O(3) bond length is 2.69 Å. The K(1)-O(4) bond length is 2.90 Å. The K(1)-O(7) bond length is 2.71 Å. The K(1)-O(8) bond length is 2.82 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.34 Å. In the second C site, C(6) is bonded in a distorted single-bond geometry to one O(3) atom. The C(6)-O(3) bond length is 1.36 Å. In the third C site, C(7) is bonded in a distorted single-bond geometry to one O(4) atom. The C(7)-O(4) bond length is 1.37 Å. In the fourth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(10)-O(5) bond length is 1.27 Å. The C(10)-O(6) bond length is 1.29 Å. In the fifth C site, C(15) is bonded in a distorted single-bond geometry to one O(7) atom. The C(15)-O(7) bond length is 1.36 Å. In the sixth C site, C(16) is bonded in a distorted single-bond geometry to one O(8) atom. The C(16)-O(8) bond length is 1.37 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a bent 150 degrees geometry to one O(2) and one O(6) atom. The H(1)-O(2) bond length is 1.04 Å. The H(1)-O(6) bond length is 1.55 Å. In the second H site, H(2) is bonded in a distorted bent 150 degrees geometry to one O(3) and one O(6) atom. The H(2)-O(3) bond length is 1.02 Å. The H(2)-O(6) bond length is 1.57 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(4) atom. The H(3)-O(4) bond length is 0.98 Å. In the fourth H site, H(9) is bonded in a distorted linear geometry to one O(5) and one O(7) atom. The H(9)-O(5) bond length is 1.52 Å. The H(9)-O(7) bond length is 1.03 Å. In the fifth H site, H(10) is bonded in a single-bond geometry to one O(8) atom. The H(10)-O(8) bond length is 0.98 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one C(1), and one H(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(1), one C(6), and one H(2) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one K(1), one C(7), and one H(3) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one C(10) and one H(9) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one C(10), one H(1), and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one K(1), one C(15), and one H(9) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one K(1), one C(16), and one H(10) atom. Linkers: 2 [O]C(=O)/C=C/c1ccc(O)c(O)c1 ,2 O=C(O)/C=C/c1ccc(O)c(O)c1. Metal clusters: 1 O/[C]=[C]\O.O/[C]=[C]\O.O/[C]=[C]\O.O/[C]=[C]\O.[CH]=C(O)O[K].[CH]=C(O)O[K]. The MOF has largest included sphere 1.82 A, density 1.58 g/cm3, surface area 4002.34 m2/g, accessible volume 0.10 cm3/g