ZnH4(C5O2)2CH crystallizes in the monoclinic P2_1/c space group. The structure consists of eight 02329_fluka molecules inside a ZnH4(C5O2)2 framework. In the ZnH4(C5O2)2 framework, there are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to one O(2), one O(4), one O(5), and one O(7) atom. The Zn(1)-O(2) bond length is 1.91 Å. The Zn(1)-O(4) bond length is 1.90 Å. The Zn(1)-O(5) bond length is 1.87 Å. The Zn(1)-O(7) bond length is 1.94 Å. In the second Zn site, Zn(2) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(3), and one O(8) atom. The Zn(2)-O(1) bond length is 1.99 Å. The Zn(2)-O(3) bond length is 1.88 Å. The Zn(2)-O(8) bond length is 1.89 Å. There are twenty inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(2), and one O(3) atom. The C(1)-C(2) bond length is 1.44 Å. The C(1)-O(2) bond length is 1.21 Å. The C(1)-O(3) bond length is 1.23 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(3) bond length is 1.35 Å. The C(2)-C(7) bond length is 1.36 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. The C(3)-H(1) bond length is 0.93 Å. In the fourth C site, C(5) is bonded in a distorted single-bond geometry to one C(6) and one H(3) atom. The C(5)-C(6) bond length is 1.37 Å. The C(5)-H(3) bond length is 0.93 Å. In the fifth C site, C(6) is bonded in a trigonal planar geometry to one C(5), one C(7), and one C(8) atom. The C(6)-C(7) bond length is 1.36 Å. The C(6)-C(8) bond length is 1.46 Å. In the sixth C site, C(7) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one H(4) atom. The C(7)-H(4) bond length is 0.93 Å. In the seventh C site, C(8) is bonded in a trigonal planar geometry to one C(13), one C(6), and one C(9) atom. The C(8)-C(13) bond length is 1.34 Å. The C(8)-C(9) bond length is 1.37 Å. In the eighth C site, C(9) is bonded in a trigonal planar geometry to one C(10), one C(14), and one C(8) atom. The C(9)-C(10) bond length is 1.37 Å. The C(9)-C(14) bond length is 1.47 Å. In the ninth C site, C(10) is bonded in a distorted single-bond geometry to one C(11), one C(9), and one H(5) atom. The C(10)-C(11) bond length is 1.34 Å. The C(10)-H(5) bond length is 0.93 Å. In the tenth C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(16) atom. The C(11)-C(12) bond length is 1.38 Å. The C(11)-C(16) bond length is 1.43 Å. In the eleventh C site, C(12) is bonded in a trigonal planar geometry to one C(11), one C(13), and one C(15) atom. The C(12)-C(13) bond length is 1.34 Å. The C(12)-C(15) bond length is 1.49 Å. In the twelfth C site, C(13) is bonded in a distorted single-bond geometry to one C(12), one C(8), and one H(6) atom. The C(13)-H(6) bond length is 0.93 Å. In the thirteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(1), and one O(4) atom. The C(14)-O(1) bond length is 1.20 Å. The C(14)-O(4) bond length is 1.24 Å. In the fourteenth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(12), one O(5), and one O(6) atom. The C(15)-O(5) bond length is 1.20 Å. The C(15)-O(6) bond length is 1.19 Å. In the fifteenth C site, C(16) is bonded in a trigonal planar geometry to one C(11), one C(17), and one C(21) atom. The C(16)-C(17) bond length is 1.39 Å. The C(16)-C(21) bond length is 1.39 Å. In the sixteenth C site, C(17) is bonded in a distorted single-bond geometry to one C(16), one C(18), and one H(7) atom. The C(17)-C(18) bond length is 1.39 Å. The C(17)-H(7) bond length is 0.93 Å. In the seventeenth C site, C(18) is bonded in a trigonal planar geometry to one C(17), one C(19), and one C(22) atom. The C(18)-C(19) bond length is 1.39 Å. The C(18)-C(22) bond length is 1.43 Å. In the eighteenth C site, C(19) is bonded in a single-bond geometry to one C(18) and one H(8) atom. The C(19)-H(8) bond length is 0.93 Å. In the nineteenth C site, C(21) is bonded in a distorted single-bond geometry to one C(16) and one H(10) atom. The C(21)-H(10) bond length is 0.93 Å. In the twentieth C site, C(22) is bonded in a distorted bent 120 degrees geometry to one C(18), one O(7), and one O(8) atom. The C(22)-O(7) bond length is 1.22 Å. The C(22)-O(8) bond length is 1.22 Å. There are eight inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(7) atom. In the fourth H site, H(5) is bonded in a single-bond geometry to one C(10) atom. In the fifth H site, H(6) is bonded in a single-bond geometry to one C(13) atom. In the sixth H site, H(7) is bonded in a single-bond geometry to one C(17) atom. In the seventh H site, H(8) is bonded in a single-bond geometry to one C(19) atom. In the eighth H site, H(10) is bonded in a single-bond geometry to one C(21) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Zn(2) and one C(14) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Zn(1) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(14) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(15) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one C(15) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Zn(1) and one C(22) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(22) atom. Linkers: 1 [O]C(=O)c1cccc(-c2cc(C([O])=O)c(-c3cccc(C([O])=O)c3)cc2C([O])=O)c1 ,3 [O]C(=O)c1cccc(-c2cc(C([O])=O)c(-c3cccc(C([O])=O)c3)cc2[C]=O)c1. Metal clusters: 4 O=[C]O[Zn]12O[C]O[Zn](O[C]O1)O[C]O2. RCSR code: sra. The MOF has largest included sphere 6.07 A, density 1.14 g/cm3, surface area 3820.19 m2/g, accessible volume 0.46 cm3/g