CdC9H5(N3O)2 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded in an octahedral geometry to one N(1), one N(2), one N(3), one N(4), one O(1), and one O(2) atom. The Cd(1)-N(1) bond length is 2.41 Å. The Cd(1)-N(2) bond length is 2.45 Å. The Cd(1)-N(3) bond length is 2.40 Å. The Cd(1)-N(4) bond length is 2.31 Å. The Cd(1)-O(1) bond length is 2.31 Å. The Cd(1)-O(2) bond length is 2.23 Å. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(4), one C(5), and one N(1) atom. The C(1)-C(4) bond length is 1.40 Å. The C(1)-C(5) bond length is 1.46 Å. The C(1)-N(1) bond length is 1.35 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one H(1) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-N(1) bond length is 1.34 Å. The C(2)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one N(2), and one H(2) atom. The C(3)-N(2) bond length is 1.34 Å. The C(3)-H(2) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(1), one N(2), and one H(3) atom. The C(4)-N(2) bond length is 1.34 Å. The C(4)-H(3) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted water-like geometry to one C(1), one N(3), and one N(6) atom. The C(5)-N(3) bond length is 1.35 Å. The C(5)-N(6) bond length is 1.35 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(7), one C(8), and one C(9) atom. The C(6)-C(7) bond length is 1.40 Å. The C(6)-C(8) bond length is 1.40 Å. The C(6)-C(9) bond length is 1.50 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(6) and one H(4) atom. The C(7)-H(4) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(6) and one H(5) atom. The C(8)-H(5) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(1), and one O(2) atom. The C(9)-O(1) bond length is 1.27 Å. The C(9)-O(2) bond length is 1.27 Å. There are six inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cd(1), one C(1), and one C(2) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cd(1), one C(3), and one C(4) atom. In the third N site, N(3) is bonded in a 3-coordinate geometry to one Cd(1), one C(5), and one N(4) atom. The N(3)-N(4) bond length is 1.34 Å. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one Cd(1), one N(3), and one N(5) atom. The N(4)-N(5) bond length is 1.33 Å. In the fifth N site, N(5) is bonded in a water-like geometry to one N(4) and one N(6) atom. The N(5)-N(6) bond length is 1.34 Å. In the sixth N site, N(6) is bonded in a distorted water-like geometry to one C(5) and one N(5) atom. There are five 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(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(7) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(8) 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(9) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Cd(1) and one C(9) atom. Linkers: 2 c1cnc(C2=NN=N[N]2)cn1 ,2 c1cnc(C2=N[N]N=N2)cn1 ,2 [O]C(=O)c1ccc(C([O])=O)cc1. Metal clusters: 4 [Cd]. The MOF has largest included sphere 2.15 A, density 2.11 g/cm3, surface area 3312.83 m2/g, accessible volume 0.10 cm3/g