ZnC7H3O4CH2CO crystallizes in the orthorhombic P2_12_12_1 space group. The structure consists of eight dimethyl ether molecules inside a ZnC7H3O4 framework. In the ZnC7H3O4 framework, there are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a tetrahedral geometry to one O(2), one O(3), one O(7), and one O(9) atom. The Zn(1)-O(2) bond length is 1.96 Å. The Zn(1)-O(3) bond length is 2.01 Å. The Zn(1)-O(7) bond length is 1.97 Å. The Zn(1)-O(9) bond length is 1.97 Å. In the second Zn site, Zn(2) is bonded in a distorted T-shaped geometry to one O(1), one O(10), and one O(4) atom. The Zn(2)-O(1) bond length is 2.09 Å. The Zn(2)-O(10) bond length is 2.07 Å. The Zn(2)-O(4) bond length is 2.06 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(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(7) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-C(7) bond length is 1.39 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. The C(3)-H(1) bond length is 0.95 Å. In the fourth C site, C(5) is bonded in a single-bond geometry to one C(6) and one H(2) atom. The C(5)-C(6) bond length is 1.40 Å. The C(5)-H(2) bond length is 0.95 Å. In the fifth C site, C(6) is bonded in a trigonal planar geometry to one C(5), one C(7), and one C(8) atom. The C(6)-C(7) bond length is 1.38 Å. The C(6)-C(8) bond length is 1.51 Å. In the sixth C site, C(7) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one H(3) atom. The C(7)-H(3) bond length is 0.95 Å. In the seventh C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.27 Å. The C(8)-O(4) bond length is 1.26 Å. In the eighth C site, C(12) is bonded in a distorted single-bond geometry to one C(13) and one H(8) atom. The C(12)-C(13) bond length is 1.38 Å. The C(12)-H(8) bond length is 0.95 Å. In the ninth C site, C(13) is bonded in a trigonal planar geometry to one C(12), one C(14), and one C(18) atom. The C(13)-C(14) bond length is 1.40 Å. The C(13)-C(18) bond length is 1.50 Å. In the tenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13), one C(15), and one H(9) atom. The C(14)-C(15) bond length is 1.40 Å. The C(14)-H(9) bond length is 0.95 Å. In the eleventh C site, C(15) is bonded in a trigonal planar geometry to one C(14), one C(16), and one C(17) atom. The C(15)-C(16) bond length is 1.39 Å. The C(15)-C(17) bond length is 1.51 Å. In the twelfth C site, C(16) is bonded in a distorted single-bond geometry to one C(15) and one H(10) atom. The C(16)-H(10) bond length is 0.95 Å. In the thirteenth C site, C(17) is bonded in a bent 120 degrees geometry to one C(15), one O(7), and one O(8) atom. The C(17)-O(7) bond length is 1.29 Å. The C(17)-O(8) bond length is 1.24 Å. In the fourteenth C site, C(18) is bonded in a bent 120 degrees geometry to one C(13), one O(10), and one O(9) atom. The C(18)-O(10) bond length is 1.25 Å. The C(18)-O(9) bond length is 1.27 Å. There are six 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(7) atom. In the fourth H site, H(8) is bonded in a single-bond geometry to one C(12) atom. In the fifth H site, H(9) is bonded in a single-bond geometry to one C(14) atom. In the sixth H site, H(10) is bonded in a single-bond geometry to one C(16) atom. There are eight inequivalent O sites. In the first O site, O(9) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(18) atom. In the second O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Zn(2) and one C(18) atom. In the third O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(1) atom. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(1) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(8) atom. In the sixth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Zn(2) and one C(8) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one Zn(1) and one C(17) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one C(17) atom. Linkers: 3 [O]C(=O)c1cc([C]=O)cc(OCCOc2cc(C([O])=O)cc(C([O])=O)c2)c1 ,1 [O]C(=O)c1cc(OCCOc2cc(C([O])=O)cc(C([O])=O)c2)cc(C([O])=O)c1. Metal clusters: 4 O=[C]O[Zn]12O[C]O[Zn](O[C]O1)O[C]O2. RCSR code: sra. The MOF has largest included sphere 7.16 A, density 0.99 g/cm3, surface area 3891.83 m2/g, accessible volume 0.52 cm3/g