Cd2C9NHO8 crystallizes in the triclinic P-1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one N(1), one O(1), one O(4), one O(6), one O(8), and two equivalent O(5) atoms to form distorted edge-sharing CdNO6 pentagonal bipyramids. The Cd(1)-N(1) bond length is 2.35 Å. The Cd(1)-O(1) bond length is 2.42 Å. The Cd(1)-O(4) bond length is 2.37 Å. The Cd(1)-O(6) bond length is 2.45 Å. The Cd(1)-O(8) bond length is 2.46 Å. There is one shorter (2.35 Å) and one longer (2.51 Å) Cd(1)-O(5) bond length. In the second Cd site, Cd(2) is bonded in a 4-coordinate geometry to one O(7), one O(8), and two equivalent O(3) atoms. The Cd(2)-O(7) bond length is 2.24 Å. The Cd(2)-O(8) bond length is 2.68 Å. There is one shorter (2.30 Å) and one longer (2.39 Å) Cd(2)-O(3) bond length. There are nine 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 1.52 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one N(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-N(1) bond length is 1.33 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(5) atom. The C(3)-C(4) bond length is 1.51 Å. The C(3)-C(5) bond length is 1.38 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(4)-O(3) bond length is 1.28 Å. The C(4)-O(4) bond length is 1.24 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(3), one C(6), and one H(1) atom. The C(5)-C(6) bond length is 1.39 Å. The C(5)-H(1) bond length is 0.93 Å. In the sixth 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 1.51 Å. The C(6)-C(8) bond length is 1.39 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(5), and one O(6) atom. The C(7)-O(5) bond length is 1.25 Å. The C(7)-O(6) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(6), one C(9), and one N(1) atom. The C(8)-C(9) bond length is 1.50 Å. The C(8)-N(1) bond length is 1.35 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(7), and one O(8) atom. The C(9)-O(7) bond length is 1.26 Å. The C(9)-O(8) bond length is 1.25 Å. N(1) is bonded in a trigonal planar geometry to one Cd(1), one C(2), and one C(8) atom. H(1) is bonded in a single-bond geometry to one C(5) atom. There are eight 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 single-bond geometry to one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Cd(2) and one C(4) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cd(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Cd(1) and one C(7) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one Cd(1) and one C(7) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Cd(2) and one C(9) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Cd(1), one Cd(2), and one C(9) atom. Linkers: 2 [O]C(=O)c1cc(C([O])=O)c(C([O])=O)nc1C([O])=O. Metal clusters: 4 [Cd]. The MOF has largest included sphere 4.66 A, density 2.25 g/cm3, surface area 2342.19 m2/g, accessible volume 0.17 cm3/g