ZnC7H5O5CH crystallizes in the orthorhombic Pca2_1 space group. The structure consists of four 02329_fluka molecules inside a ZnC7H5O5 framework. In the ZnC7H5O5 framework, Zn(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(5) atom. The Zn(1)-O(1) bond length is 1.98 Å. The Zn(1)-O(2) bond length is 2.00 Å. The Zn(1)-O(3) bond length is 1.98 Å. The Zn(1)-O(5) bond length is 2.00 Å. There are seven inequivalent C sites. In the first C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(1) bond length is 1.49 Å. The C(2)-C(3) bond length is 1.40 Å. The C(2)-C(7) bond length is 1.40 Å. In the second 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 1.40 Å. The C(3)-H(1) bond length is 1.09 Å. In the third 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 1.40 Å. The C(4)-C(8) bond length is 1.49 Å. In the fourth 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 1.09 Å. In the fifth C site, C(7) is bonded in a distorted single-bond geometry to one C(2) and one H(4) atom. The C(7)-H(4) bond length is 1.09 Å. In the sixth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.28 Å. The C(8)-O(4) bond length is 1.28 Å. In the seventh 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)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.28 Å. There are five 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(4) is bonded in a single-bond geometry to one C(7) atom. In the fourth H site, H(5) is bonded in a distorted single-bond geometry to one O(4) and one O(5) atom. The H(5)-O(4) bond length is 1.67 Å. The H(5)-O(5) bond length is 1.00 Å. In the fifth H site, H(6) is bonded in a distorted single-bond geometry to one O(4) and one O(5) atom. The H(6)-O(4) bond length is 1.68 Å. The H(6)-O(5) bond length is 1.00 Å. There are five inequivalent O sites. In the first O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(1) atom. In the second O site, O(3) is bonded in a water-like geometry to one Zn(1) and one C(8) atom. In the third O site, O(4) is bonded in a distorted trigonal planar geometry to one C(8), one H(5), and one H(6) atom. In the fourth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one H(5), and one H(6) atom. In the fifth O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(1) atom. Linkers: 4 [O]C(=O)c1cccc(C([O])=O)c1. Metal clusters: 4 [Zn]. RCSR code: hcb. The MOF has largest included sphere 1.90 A, density 1.92 g/cm3, surface area 3949.79 m2/g, accessible volume 0.09 cm3/g