CdC7NH7O6 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded to one N(1), one O(1), one O(5), one O(6), and two equivalent O(4) atoms to form edge-sharing CdNO5 octahedra. The Cd(1)-N(1) bond length is 2.34 Å. The Cd(1)-O(1) bond length is 2.30 Å. The Cd(1)-O(5) bond length is 2.36 Å. The Cd(1)-O(6) bond length is 2.25 Å. There is one shorter (2.39 Å) and one longer (2.41 Å) Cd(1)-O(4) bond length. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one C(6), and one N(1) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-C(6) bond length is 1.52 Å. The C(1)-N(1) bond length is 1.35 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 1.40 Å. The C(2)-C(7) bond length is 1.51 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 1.09 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to 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 1.09 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(3) atom. The C(5)-N(1) bond length is 1.34 Å. The C(5)-H(3) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(6)-O(1) bond length is 1.29 Å. The C(6)-O(2) bond length is 1.25 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(3), and one O(4) atom. The C(7)-O(3) bond length is 1.26 Å. The C(7)-O(4) bond length is 1.28 Å. N(1) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(1), and one C(5) atom. There are seven 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(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(4) is bonded in a distorted single-bond geometry to one O(3) and one O(5) atom. The H(4)-O(3) bond length is 1.66 Å. The H(4)-O(5) bond length is 1.00 Å. In the fifth H site, H(5) is bonded in a distorted single-bond geometry to one O(3) and one O(5) atom. The H(5)-O(3) bond length is 1.71 Å. The H(5)-O(5) bond length is 1.00 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(2) and one O(6) atom. The H(6)-O(2) bond length is 1.71 Å. The H(6)-O(6) bond length is 0.99 Å. In the seventh H site, H(7) is bonded in a linear geometry to one O(1) and one O(6) atom. The H(7)-O(1) bond length is 1.60 Å. The H(7)-O(6) bond length is 1.01 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(6), and one H(7) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one C(6) and one H(6) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one C(7), one H(4), and one H(5) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Cd(1) and one C(7) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one Cd(1), one H(4), and one H(5) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one Cd(1), one H(6), and one H(7) atom. Linkers: 4 [O]C(=O)c1cccnc1C([O])=O. Metal clusters: 4 [Cd]. The MOF has largest included sphere 2.36 A, density 2.26 g/cm3, surface area 3141.67 m2/g, accessible volume 0.13 cm3/g