ZnH6(C3O)4 crystallizes in the triclinic P-1 space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a trigonal planar geometry to one O(2), one O(3), and one O(6) atom. The Zn(1)-O(2) bond length is 1.96 Å. The Zn(1)-O(3) bond length is 1.94 Å. The Zn(1)-O(6) bond length is 1.93 Å. In the second Zn site, Zn(2) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms. Both Zn(2)-O(1) bond lengths are 2.04 Å. Both Zn(2)-O(4) bond lengths are 2.11 Å. Both Zn(2)-O(5) bond lengths are 2.12 Å. There are eighteen 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(1), and one O(2) atom. The C(1)-C(2) bond length is 1.50 Å. The C(1)-O(1) bond length is 1.25 Å. The C(1)-O(2) bond length is 1.28 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(6) atom. The C(2)-C(3) bond length is 1.37 Å. The C(2)-C(6) bond length is 1.41 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(1) atom. The C(3)-C(4) bond length is 1.42 Å. The C(3)-H(1) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(4), and one C(5) atom. The C(4)-C(4) bond length is 1.43 Å. The C(4)-C(5) bond length is 1.41 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4) and one H(2) atom. The C(5)-H(2) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(2) and one H(3) atom. The C(6)-H(3) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(3), and one O(4) atom. The C(7)-C(8) bond length is 1.50 Å. The C(7)-O(3) bond length is 1.29 Å. The C(7)-O(4) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(11), one C(7), and one C(9) atom. The C(8)-C(11) bond length is 1.37 Å. The C(8)-C(9) bond length is 1.42 Å. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(8) and one H(4) atom. The C(9)-H(4) bond length is 0.93 Å. In the tenth C site, C(10) is bonded in a distorted single-bond geometry to one C(12) and one H(5) atom. The C(10)-C(12) bond length is 1.42 Å. The C(10)-H(5) bond length is 0.93 Å. In the eleventh C site, C(11) is bonded in a distorted single-bond geometry to one C(12), one C(8), and one H(6) atom. The C(11)-C(12) bond length is 1.42 Å. The C(11)-H(6) bond length is 0.93 Å. In the twelfth C site, C(12) is bonded in a trigonal planar geometry to one C(10), one C(11), and one C(12) atom. The C(12)-C(12) bond length is 1.42 Å. In the thirteenth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(14), one O(5), and one O(6) atom. The C(13)-C(14) bond length is 1.50 Å. The C(13)-O(5) bond length is 1.26 Å. The C(13)-O(6) bond length is 1.27 Å. In the fourteenth C site, C(14) is bonded in a trigonal planar geometry to one C(13), one C(15), and one C(18) atom. The C(14)-C(15) bond length is 1.42 Å. The C(14)-C(18) bond length is 1.38 Å. In the fifteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(14) and one H(7) atom. The C(15)-H(7) bond length is 0.93 Å. In the sixteenth C site, C(16) is bonded in a distorted single-bond geometry to one C(17) and one H(8) atom. The C(16)-C(17) bond length is 1.42 Å. The C(16)-H(8) bond length is 0.93 Å. In the seventeenth C site, C(17) is bonded in a trigonal planar geometry to one C(16), one C(17), and one C(18) atom. The C(17)-C(17) bond length is 1.43 Å. The C(17)-C(18) bond length is 1.42 Å. In the eighteenth C site, C(18) is bonded in a distorted single-bond geometry to one C(14), one C(17), and one H(9) atom. The C(18)-H(9) bond length is 0.93 Å. There are nine 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(2) is bonded in a single-bond geometry to one C(5) 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(9) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(10) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(11) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(15) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(16) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(18) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Zn(2) 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(1) atom. In the third O site, O(3) is bonded in a water-like geometry to one Zn(1) and one C(7) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Zn(2) and one C(7) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(13) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(13) atom. Linkers: 3 [O]C(=O)c1ccc2cc(C([O])=O)ccc2c1. Metal clusters: 1 [C]1O[Zn]2O[C]O[Zn]34(O1)(O[C]O2)O[C]O[Zn](O[C]O3)O[C]O4. RCSR code: pcu. The MOF has largest included sphere 5.25 A, density 1.22 g/cm3, surface area 4248.34 m2/g, accessible volume 0.34 cm3/g