CdC5N2H3O2Cl crystallizes in the tetragonal I-4c2 space group. The structure consists of a CdC5N2H3O2Cl framework. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to two equivalent N(1), two equivalent O(1), and two equivalent Cl(1) atoms to form edge-sharing CdN2Cl2O2 octahedra. Both Cd(1)-N(1) bond lengths are 2.34 Å. Both Cd(1)-O(1) bond lengths are 2.32 Å. Both Cd(1)-Cl(1) bond lengths are 2.65 Å. In the second Cd site, Cd(2) is bonded to two equivalent N(2), two equivalent O(2), and two equivalent Cl(2) atoms to form edge-sharing CdN2Cl2O2 octahedra. Both Cd(2)-N(2) bond lengths are 2.43 Å. Both Cd(2)-O(2) bond lengths are 2.33 Å. Both Cd(2)-Cl(2) bond lengths are 2.60 Å. There are five 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 1.53 Å. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(2) bond length is 1.26 Å. In the second C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(2), and one H(3) atom. The C(5)-C(4) bond length is 1.39 Å. The C(5)-N(2) bond length is 1.34 Å. The C(5)-H(3) bond length is 1.09 Å. In the third C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one N(1), and one N(2) atom. The C(2)-N(1) bond length is 1.34 Å. The C(2)-N(2) bond length is 1.34 Å. In the fourth C site, C(3) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(1) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-N(1) bond length is 1.34 Å. The C(3)-H(1) bond length is 1.09 Å. In the fifth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one H(2) atom. The C(4)-H(2) bond length is 1.09 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cd(1), one C(2), and one C(3) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(2), and one C(5) atom. There are three inequivalent H sites. In the first H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(2) is bonded in a single-bond geometry to one C(4) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cd(2) and one C(1) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in an L-shaped geometry to two equivalent Cd(1) atoms. In the second Cl site, Cl(2) is bonded in an L-shaped geometry to two equivalent Cd(2) atoms. Linkers: 7 [O]C(=O)c1ncccn1. Metal clusters: 8 [Cd]. The MOF has largest included sphere 2.36 A, density 2.32 g/cm3, surface area 3096.53 m2/g, accessible volume 0.11 cm3/g