ZnH3(C3O2)3 crystallizes in the monoclinic P2/c space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(4), and one O(5) atom. The Zn(1)-O(1) bond length is 1.90 Å. The Zn(1)-O(3) bond length is 1.94 Å. The Zn(1)-O(4) bond length is 1.93 Å. The Zn(1)-O(5) bond length is 1.91 Å. In the second Zn site, Zn(2) is bonded in a tetrahedral geometry to two equivalent O(6) and two equivalent O(8) atoms. Both Zn(2)-O(6) bond lengths are 1.94 Å. Both Zn(2)-O(8) bond lengths are 1.91 Å. There are fifteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(14), one C(2), and one H(1) atom. The C(1)-C(14) bond length is 1.39 Å. The C(1)-C(2) bond length is 1.38 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(13), and one C(3) atom. The C(2)-C(13) bond length is 1.40 Å. The C(2)-C(3) bond length is 1.48 Å. In the third C site, C(3) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(3)-O(1) bond length is 1.25 Å. The C(3)-O(2) bond length is 1.21 Å. In the fourth C site, C(4) is bonded in a single-bond geometry to one C(5), one C(9), and one H(2) atom. The C(4)-C(5) bond length is 1.36 Å. The C(4)-C(9) bond length is 1.37 Å. The C(4)-H(2) bond length is 0.93 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(11), one C(4), and one C(6) atom. The C(5)-C(11) bond length is 1.47 Å. The C(5)-C(6) bond length is 1.36 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(5), one C(7), and one H(3) atom. The C(6)-C(7) bond length is 1.41 Å. The C(6)-H(3) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(10), one C(6), and one C(8) atom. The C(7)-C(10) bond length is 1.45 Å. The C(7)-C(8) bond length is 1.42 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(7), one C(9), and one H(4) atom. The C(8)-C(9) bond length is 1.38 Å. The C(8)-H(4) bond length is 0.93 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(12), one C(4), and one C(8) atom. The C(9)-C(12) bond length is 1.49 Å. In the tenth C site, C(10) is bonded in a bent 120 degrees geometry to one C(7), one O(4), and one O(5) atom. The C(10)-O(4) bond length is 1.25 Å. The C(10)-O(5) bond length is 1.25 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(6), and one O(7) atom. The C(11)-O(6) bond length is 1.28 Å. The C(11)-O(7) bond length is 1.26 Å. In the twelfth C site, C(12) is bonded in a bent 120 degrees geometry to one C(9), one O(8), and one O(9) atom. The C(12)-O(8) bond length is 1.27 Å. The C(12)-O(9) bond length is 1.24 Å. In the thirteenth C site, C(13) is bonded in a distorted single-bond geometry to two equivalent C(2) and one H(5) atom. The C(13)-H(5) bond length is 0.93 Å. In the fourteenth C site, C(14) is bonded in a trigonal planar geometry to one C(15) and two equivalent C(1) atoms. The C(14)-C(15) bond length is 1.49 Å. In the fifteenth C site, C(15) is bonded in a bent 120 degrees geometry to one C(14) and two equivalent O(3) atoms. Both C(15)-O(3) bond lengths are 1.24 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(8) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(13) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(3) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(3) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one C(15) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Zn(1) and one C(10) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one C(10) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(11) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one C(11) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(12) atom. In the ninth O site, O(9) is bonded in a single-bond geometry to one C(12) atom. Linkers: 6 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 2 O=[C]O[Zn@]12O[C]O[Zn@](O[C]=O)(O[C]O1)O[C]O2 ,2 O=[C]O[Zn](O[C]=O)(O[C]=O)O[C]=O. The MOF has largest included sphere 9.74 A, density 0.77 g/cm3, surface area 3983.20 m2/g, accessible volume 0.86 cm3/g