ZnC5H7O7 crystallizes in the triclinic P-1 space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in an octahedral geometry to one O(10), one O(11), one O(14), one O(2), one O(6), and one O(9) atom. The Zn(1)-O(10) bond length is 2.04 Å. The Zn(1)-O(11) bond length is 2.08 Å. The Zn(1)-O(14) bond length is 2.14 Å. The Zn(1)-O(2) bond length is 2.06 Å. The Zn(1)-O(6) bond length is 2.18 Å. The Zn(1)-O(9) bond length is 2.28 Å. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(13), one O(5), and one O(9) atom. The Zn(2)-O(1) bond length is 2.02 Å. The Zn(2)-O(12) bond length is 2.18 Å. The Zn(2)-O(13) bond length is 2.03 Å. The Zn(2)-O(5) bond length is 2.11 Å. The Zn(2)-O(9) bond length is 2.13 Å. There are ten inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(4) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(3) bond length is 1.39 Å. The C(1)-C(4) bond length is 1.50 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(5) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(5) bond length is 1.50 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(2), and one H(1) atom. The C(3)-H(1) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(4)-O(1) bond length is 1.28 Å. The C(4)-O(2) bond length is 1.27 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(3), and one O(4) atom. The C(5)-O(3) bond length is 1.28 Å. The C(5)-O(4) bond length is 1.27 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(7), one C(8), and one C(9) atom. The C(6)-C(7) bond length is 1.41 Å. The C(6)-C(8) bond length is 1.40 Å. The C(6)-C(9) bond length is 1.49 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 1.50 Å. The C(7)-C(8) bond length is 1.39 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(6), one C(7), and one H(2) atom. The C(8)-H(2) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a bent 120 degrees geometry to one C(6), one O(5), and one O(6) atom. The C(9)-O(5) bond length is 1.29 Å. The C(9)-O(6) bond length is 1.27 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(7), and one O(8) atom. The C(10)-O(7) bond length is 1.26 Å. The C(10)-O(8) bond length is 1.29 Å. There are fourteen 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(8) atom. In the third H site, H(3) is bonded in a distorted linear geometry to one O(4) and one O(9) atom. The H(3)-O(4) bond length is 1.60 Å. The H(3)-O(9) bond length is 1.02 Å. In the fourth H site, H(4) is bonded in a linear geometry to one O(7) and one O(9) atom. The H(4)-O(7) bond length is 1.55 Å. The H(4)-O(9) bond length is 1.03 Å. In the fifth H site, H(5) is bonded in a distorted linear geometry to one O(10) and one O(8) atom. The H(5)-O(10) bond length is 1.00 Å. The H(5)-O(8) bond length is 1.64 Å. In the sixth H site, H(6) is bonded in a distorted single-bond geometry to one O(10) atom. The H(6)-O(10) bond length is 1.00 Å. In the seventh H site, H(7) is bonded in a distorted single-bond geometry to one O(11) and one O(3) atom. The H(7)-O(11) bond length is 1.01 Å. The H(7)-O(3) bond length is 1.64 Å. In the eighth H site, H(8) is bonded in a distorted single-bond geometry to one O(11) and one O(5) atom. The H(8)-O(11) bond length is 1.00 Å. The H(8)-O(5) bond length is 1.65 Å. In the ninth H site, H(9) is bonded in a single-bond geometry to one O(12) atom. The H(9)-O(12) bond length is 1.00 Å. In the tenth H site, H(10) is bonded in a single-bond geometry to one O(12) atom. The H(10)-O(12) bond length is 0.98 Å. In the eleventh H site, H(11) is bonded in a linear geometry to one O(13) and one O(3) atom. The H(11)-O(13) bond length is 1.02 Å. The H(11)-O(3) bond length is 1.59 Å. In the twelfth H site, H(12) is bonded in a single-bond geometry to one O(13) atom. The H(12)-O(13) bond length is 0.97 Å. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one O(14) atom. The H(13)-O(14) bond length is 0.97 Å. In the fourteenth H site, H(14) is bonded in a single-bond geometry to one O(14) atom. The H(14)-O(14) bond length is 0.99 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Zn(1) and one C(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one C(5), one H(11), and one H(7) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one C(5) and one H(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Zn(2), one C(9), and one H(8) atom. In the sixth O site, O(6) is bonded in a 1-coordinate geometry to one Zn(1) and one C(9) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one C(10) and one H(4) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one C(10) and one H(5) atom. In the ninth O site, O(9) is bonded in a distorted water-like geometry to one Zn(1), one Zn(2), one H(3), and one H(4) atom. In the tenth O site, O(10) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one H(5), and one H(6) atom. In the eleventh O site, O(11) is bonded in a distorted water-like geometry to one Zn(1), one H(7), and one H(8) atom. In the twelfth O site, O(12) is bonded in a distorted water-like geometry to one Zn(2), one H(10), and one H(9) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal non-coplanar geometry to one Zn(2), one H(11), and one H(12) atom. In the fourteenth O site, O(14) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one H(13), and one H(14) atom. Linkers: 2 [O]C(=O)c1cc(C([O])=O)c(C([O])=O)cc1C([O])=O. Metal clusters: 2 O.O.O.O.O.O.[C]1O[Zn]O[C]O[Zn]O1. The MOF has largest included sphere 2.40 A, density 1.97 g/cm3, surface area 3435.88 m2/g, accessible volume 0.12 cm3/g