CdC7N5H7O2 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded to one N(1), one N(2), two equivalent N(3), one O(1), and one O(2) atom to form distorted corner-sharing CdN4O2 octahedra. The corner-sharing octahedral tilt angles are 73°. The Cd(1)-N(1) bond length is 2.37 Å. The Cd(1)-N(2) bond length is 2.40 Å. There is one shorter (2.39 Å) and one longer (2.54 Å) Cd(1)-N(3) bond length. The Cd(1)-O(1) bond length is 2.35 Å. The Cd(1)-O(2) bond length is 2.41 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.50 Å. The C(1)-O(1) bond length is 1.29 Å. The C(1)-O(2) bond length is 1.27 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 1.40 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(1) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(1) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one N(1) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-N(1) bond length is 1.43 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4), one C(6), and one H(2) atom. The C(5)-C(6) bond length is 1.40 Å. The C(5)-H(2) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(5), one C(7), and one N(2) atom. The C(6)-C(7) bond length is 1.39 Å. The C(6)-N(2) bond length is 1.42 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one H(3) atom. The C(7)-H(3) bond length is 1.09 Å. There are five inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Cd(1), one C(4), one H(4), and one H(5) atom. The N(1)-H(4) bond length is 1.02 Å. The N(1)-H(5) bond length is 1.04 Å. In the second N site, N(2) is bonded in a 2-coordinate geometry to one Cd(1), one C(6), one H(6), and one H(7) atom. The N(2)-H(6) bond length is 1.02 Å. The N(2)-H(7) bond length is 1.03 Å. In the third N site, N(3) is bonded in a trigonal non-coplanar geometry to two equivalent Cd(1) and one N(4) atom. The N(3)-N(4) bond length is 1.20 Å. In the fourth N site, N(4) is bonded in a linear geometry to one N(3) and one N(5) atom. The N(4)-N(5) bond length is 1.17 Å. In the fifth N site, N(5) is bonded in a single-bond geometry to one N(4) 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(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(1) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one N(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one N(2) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one N(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cd(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Cd(1) and one C(1) atom. Linkers: 4 Nc1cc(N)cc(C([O])=O)c1. Metal clusters: 4 [Cd]. The MOF has largest included sphere 2.06 A, density 2.35 g/cm3, surface area 3037.67 m2/g, accessible volume 0.09 cm3/g