CdC2H2O5CH2 crystallizes in the trigonal R-3 space group. The structure consists of eighteen 02329_fluka molecules inside a CdC2H2O5 framework. In the CdC2H2O5 framework, Cd(1) is bonded to one O(2), one O(4), one O(5), two equivalent O(1), and two equivalent O(3) atoms to form corner-sharing CdO7 pentagonal bipyramids. The Cd(1)-O(2) bond length is 2.41 Å. The Cd(1)-O(4) bond length is 2.54 Å. The Cd(1)-O(5) bond length is 2.28 Å. There is one shorter (2.32 Å) and one longer (2.52 Å) Cd(1)-O(1) bond length. There is one shorter (2.32 Å) and one longer (2.42 Å) Cd(1)-O(3) bond length. There are two inequivalent C sites. In the first C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(3)-O(3) bond length is 1.28 Å. The C(3)-O(4) bond length is 1.26 Å. In the second C site, C(1) is bonded in a distorted bent 120 degrees geometry to 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 1.27 Å. There are two inequivalent H sites. In the first H site, H(4) is bonded in a single-bond geometry to one O(2) and one O(5) atom. The H(4)-O(2) bond length is 1.72 Å. The H(4)-O(5) bond length is 0.99 Å. In the second H site, H(3) is bonded in a distorted single-bond geometry to one O(4) and one O(5) atom. The H(3)-O(4) bond length is 1.67 Å. The H(3)-O(5) bond length is 1.00 Å. There are five inequivalent O sites. In the first O site, O(4) is bonded in a 3-coordinate geometry to one Cd(1), one C(3), and one H(3) atom. In the second O site, O(5) is bonded in a distorted water-like geometry to one Cd(1), one H(3), and one H(4) atom. In the third O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Cd(1) and one C(1) atom. In the fourth O site, O(2) is bonded in a distorted single-bond geometry to one Cd(1), one C(1), and one H(4) atom. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Cd(1) and one C(3) atom. Linkers: 6 [O]C(=O)CC([O])=O. Metal clusters: 6 [Cd]. The MOF has largest included sphere 3.33 A, density 2.47 g/cm3, surface area 2762.03 m2/g, accessible volume 0.12 cm3/g