ZnH12(C3O)4 crystallizes in the monoclinic C2/c space group. Zn(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Zn(1)-O(1) bond length is 1.98 Å. The Zn(1)-O(2) bond length is 1.95 Å. The Zn(1)-O(3) bond length is 1.96 Å. The Zn(1)-O(4) bond length is 1.97 Å. There are fourteen inequivalent C sites. In the first C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(3), and one O(4) atom. The C(9)-C(10) bond length is 1.50 Å. The C(9)-O(3) bond length is 1.28 Å. The C(9)-O(4) bond length is 1.27 Å. In the second C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(13), and one C(9) atom. The C(10)-C(11) bond length is 1.41 Å. The C(10)-C(13) bond length is 1.41 Å. In the third C site, C(11) is bonded in a trigonal planar geometry to one C(10), one C(12), and one C(13) atom. The C(11)-C(12) bond length is 1.51 Å. The C(11)-C(13) bond length is 1.41 Å. In the fourth C site, C(12) is bonded in a distorted trigonal non-coplanar geometry to one C(11), one H(7), one H(8), and one H(9) atom. The C(12)-H(7) bond length is 1.10 Å. The C(12)-H(8) bond length is 1.10 Å. The C(12)-H(9) bond length is 1.10 Å. In the fifth C site, C(13) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(14) atom. The C(13)-C(14) bond length is 1.50 Å. In the sixth C site, C(14) is bonded in a distorted trigonal non-coplanar geometry to one C(13), one H(10), one H(11), and one H(12) atom. The C(14)-H(10) bond length is 1.09 Å. The C(14)-H(11) bond length is 1.10 Å. The C(14)-H(12) bond length is 1.10 Å. In the seventh C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2) and two equivalent O(1) atoms. The C(1)-C(2) bond length is 1.49 Å. Both C(1)-O(1) bond lengths are 1.28 Å. In the eighth C site, C(2) is bonded in a trigonal planar geometry to one C(1) and two equivalent C(3) atoms. Both C(2)-C(3) bond lengths are 1.41 Å. In the ninth C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(7) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-C(7) bond length is 1.51 Å. In the tenth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(8) atom. The C(4)-C(5) bond length is 1.41 Å. The C(4)-C(8) bond length is 1.50 Å. In the eleventh C site, C(5) is bonded in a trigonal planar geometry to one C(6) and two equivalent C(4) atoms. The C(5)-C(6) bond length is 1.50 Å. In the twelfth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5) and two equivalent O(2) atoms. Both C(6)-O(2) bond lengths are 1.27 Å. In the thirteenth C site, C(7) is bonded in a distorted trigonal non-coplanar geometry to one C(3), one H(1), one H(2), and one H(3) atom. The C(7)-H(1) bond length is 1.10 Å. The C(7)-H(2) bond length is 1.10 Å. The C(7)-H(3) bond length is 1.09 Å. In the fourteenth C site, C(8) is bonded in a distorted trigonal non-coplanar geometry to one C(4), one H(4), one H(5), and one H(6) atom. The C(8)-H(4) bond length is 1.10 Å. The C(8)-H(5) bond length is 1.10 Å. The C(8)-H(6) bond length is 1.09 Å. There are twelve inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(7) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(7) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) 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(8) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(8) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(12) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(12) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(12) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(14) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(14) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(14) atom. There are four 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(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(6) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(9) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Zn(1) and one C(9) atom. Linkers: 4 Cc1c(C)c(C([O])=O)c(C)c(C)c1C([O])=O. Metal clusters: 4 [Zn]. The MOF has largest included sphere 2.38 A, density 1.58 g/cm3, surface area 4690.67 m2/g, accessible volume 0.22 cm3/g