Cd2C9H3(O3Cl)2 crystallizes in the triclinic P-1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(6), and one Cl(1) atom. The Cd(1)-O(2) bond length is 2.27 Å. The Cd(1)-O(3) bond length is 2.28 Å. The Cd(1)-O(4) bond length is 2.21 Å. The Cd(1)-O(5) bond length is 2.36 Å. The Cd(1)-O(6) bond length is 2.44 Å. The Cd(1)-Cl(1) bond length is 2.76 Å. In the second Cd site, Cd(2) is bonded to one O(1), one O(6), one Cl(1), and two equivalent Cl(2) atoms to form edge-sharing CdCl3O2 trigonal bipyramids. The Cd(2)-O(1) bond length is 2.15 Å. The Cd(2)-O(6) bond length is 2.37 Å. The Cd(2)-Cl(1) bond length is 2.48 Å. There is one shorter (2.44 Å) and one longer (2.71 Å) Cd(2)-Cl(2) bond length. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(7) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(6) bond length is 1.39 Å. The C(1)-C(7) bond length is 1.51 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-H(1) bond length is 0.94 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(8) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-C(8) bond length is 1.50 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(2) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-H(2) bond length is 0.94 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(9) atom. The C(5)-C(6) bond length is 1.40 Å. The C(5)-C(9) bond length is 1.50 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one H(3) atom. The C(6)-H(3) bond length is 0.94 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(7)-O(1) bond length is 1.25 Å. The C(7)-O(2) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(3), 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 ninth C site, C(9) is bonded in a bent 120 degrees geometry to one C(5), one O(5), and one O(6) atom. The C(9)-O(5) bond length is 1.25 Å. The C(9)-O(6) bond length is 1.27 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cd(2) and one C(7) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one C(7) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cd(1) and one C(8) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Cd(1) and one C(8) atom. In the fifth O site, O(5) is bonded in a distorted L-shaped geometry to one Cd(1) and one C(9) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Cd(1), one Cd(2), and one C(9) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in an L-shaped geometry to one Cd(1) and one Cd(2) atom. In the second Cl site, Cl(2) is bonded in an L-shaped geometry to two equivalent Cd(2) atoms. Linkers: 2 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 4 [Cd]. The MOF has largest included sphere 4.72 A, density 1.81 g/cm3, surface area 2863.29 m2/g, accessible volume 0.21 cm3/g