ZnC7H6O4 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted trigonal bipyramidal geometry to one O(1), one O(3), one O(5), one O(6), and one O(7) atom. The Zn(1)-O(1) bond length is 1.99 Å. The Zn(1)-O(3) bond length is 1.96 Å. The Zn(1)-O(5) bond length is 2.28 Å. The Zn(1)-O(6) bond length is 2.03 Å. The Zn(1)-O(7) bond length is 1.99 Å. In the second Zn site, Zn(2) is bonded in a T-shaped geometry to one O(2), one O(4), and one O(8) atom. The Zn(2)-O(2) bond length is 2.09 Å. The Zn(2)-O(4) bond length is 1.96 Å. The Zn(2)-O(8) bond length is 1.96 Å. There are fourteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(1), and one O(2) atom. The C(1)-C(5) bond length is 1.52 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(5), and one O(6) atom. The C(2)-C(6) bond length is 1.53 Å. The C(2)-O(5) bond length is 1.26 Å. The C(2)-O(6) bond length is 1.25 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(3), and one O(4) atom. The C(3)-C(7) bond length is 1.53 Å. The C(3)-O(3) bond length is 1.25 Å. The C(3)-O(4) bond length is 1.26 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(8), one O(7), and one O(8) atom. The C(4)-C(8) bond length is 1.53 Å. The C(4)-O(7) bond length is 1.26 Å. The C(4)-O(8) bond length is 1.26 Å. In the fifth C site, C(5) is bonded to one C(1), one C(12), one C(13), and one C(9) atom to form corner-sharing CC4 tetrahedra. The C(5)-C(12) bond length is 1.56 Å. The C(5)-C(13) bond length is 1.54 Å. The C(5)-C(9) bond length is 1.53 Å. In the sixth C site, C(6) is bonded to one C(10), one C(14), one C(2), and one C(9) atom to form corner-sharing CC4 tetrahedra. The C(6)-C(10) bond length is 1.54 Å. The C(6)-C(14) bond length is 1.55 Å. The C(6)-C(9) bond length is 1.52 Å. In the seventh C site, C(7) is bonded to one C(10), one C(11), one C(13), and one C(3) atom to form corner-sharing CC4 tetrahedra. The C(7)-C(10) bond length is 1.54 Å. The C(7)-C(11) bond length is 1.53 Å. The C(7)-C(13) bond length is 1.54 Å. In the eighth C site, C(8) is bonded to one C(11), one C(12), one C(14), and one C(4) atom to form corner-sharing CC4 tetrahedra. The C(8)-C(11) bond length is 1.54 Å. The C(8)-C(12) bond length is 1.53 Å. The C(8)-C(14) bond length is 1.54 Å. In the ninth C site, C(9) is bonded in a water-like geometry to one C(5), one C(6), one H(1), and one H(2) atom. The C(9)-H(1) bond length is 0.99 Å. The C(9)-H(2) bond length is 0.99 Å. In the tenth C site, C(10) is bonded in a water-like geometry to one C(6); one C(7); and two equivalent H(3,4,5,6) atoms. Both C(10)-H(3,4,5,6) bond lengths are 0.99 Å. In the eleventh C site, C(11) is bonded in a water-like geometry to one C(7); one C(8); and two equivalent H(3,4,5,6) atoms. Both C(11)-H(3,4,5,6) bond lengths are 0.99 Å. In the twelfth C site, C(12) is bonded in a water-like geometry to one C(5); one C(8); and two equivalent H(7,8) atoms. Both C(12)-H(7,8) bond lengths are 0.99 Å. In the thirteenth C site, C(13) is bonded in a water-like geometry to one C(5); one C(7); and two equivalent H(9,10) atoms. Both C(13)-H(9,10) bond lengths are 0.99 Å. In the fourteenth C site, C(14) is bonded in a water-like geometry to one C(6); one C(8); and two equivalent H(11,12) atoms. Both C(14)-H(11,12) bond lengths are 0.99 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(9) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(9) atom. In the third H site, H(3,4,5,6) is bonded in a single-bond geometry to one C(10) atom. In the fourth H site, H(7,8) is bonded in a single-bond geometry to one C(12) atom. In the fifth H site, H(9,10) is bonded in a single-bond geometry to one C(13) atom. In the sixth H site, H(11,12) is bonded in a single-bond geometry to one C(14) atom. There are eight 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 distorted bent 150 degrees geometry to one Zn(2) and one C(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(3) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Zn(2) and one C(3) atom. In the fifth O site, O(5) is bonded in a distorted L-shaped geometry to one Zn(1) and one C(2) atom. In the sixth O site, O(6) is bonded in an L-shaped geometry to one Zn(1) and one C(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Zn(1) and one C(4) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Zn(2) and one C(4) atom. Linkers: 4 [O]C(=O)[C@]12C[C@]3(C([O])=O)C[C@](C([O])=O)(C1)C[C@](C([O])=O)(C2)C3. Metal clusters: 4 [C]1O[Zn]2O[C]O[Zn]3(O1)(O[C]O2)O[C]O3. RCSR code: sra. The MOF has largest included sphere 5.78 A, density 1.19 g/cm3, surface area 3395.65 m2/g, accessible volume 0.44 cm3/g