CdC6H3(N3O)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 7-coordinate geometry to one N(1), one N(12), one N(6), one N(7), one O(1), one O(2), and one O(3) atom. The Cd(1)-N(1) bond length is 2.41 Å. The Cd(1)-N(12) bond length is 2.69 Å. The Cd(1)-N(6) bond length is 2.42 Å. The Cd(1)-N(7) bond length is 2.32 Å. The Cd(1)-O(1) bond length is 2.31 Å. The Cd(1)-O(2) bond length is 2.41 Å. The Cd(1)-O(3) bond length is 2.39 Å. In the second Cd site, Cd(2) is bonded in a 7-coordinate geometry to one N(10), one N(11), one N(4), one N(5), one O(1), one O(3), and one O(4) atom. The Cd(2)-N(10) bond length is 2.32 Å. The Cd(2)-N(11) bond length is 2.74 Å. The Cd(2)-N(4) bond length is 2.31 Å. The Cd(2)-N(5) bond length is 2.59 Å. The Cd(2)-O(1) bond length is 2.41 Å. The Cd(2)-O(3) bond length is 2.32 Å. The Cd(2)-O(4) bond length is 2.38 Å. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one N(4) atom. The C(1)-C(2) bond length is 1.45 Å. The C(1)-N(1) bond length is 1.34 Å. The C(1)-N(4) bond length is 1.34 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one N(5), and one N(6) atom. The C(2)-N(5) bond length is 1.34 Å. The C(2)-N(6) bond length is 1.34 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(4), one N(5), and one H(1) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-N(5) bond length is 1.34 Å. 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(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 1.09 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(6), and one H(3) atom. The C(5)-N(6) 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 trigonal planar geometry to one C(7), one N(10), and one N(7) atom. The C(6)-C(7) bond length is 1.46 Å. The C(6)-N(10) bond length is 1.34 Å. The C(6)-N(7) bond length is 1.34 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(6), one N(11), and one N(12) atom. The C(7)-N(11) bond length is 1.34 Å. The C(7)-N(12) bond length is 1.34 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(9), one N(11), and one H(4) atom. The C(8)-C(9) bond length is 1.40 Å. The C(8)-N(11) bond length is 1.34 Å. The C(8)-H(4) bond length is 1.09 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(10), one C(8), and one H(5) atom. The C(9)-C(10) bond length is 1.39 Å. The C(9)-H(5) bond length is 1.09 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(9), one N(12), and one H(6) atom. The C(10)-N(12) bond length is 1.34 Å. The C(10)-H(6) bond length is 1.09 Å. In the eleventh C site, C(11) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(11)-O(1) bond length is 1.27 Å. The C(11)-O(2) bond length is 1.26 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(12)-O(3) bond length is 1.27 Å. The C(12)-O(4) bond length is 1.25 Å. There are twelve inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Cd(1), one C(1), and one N(2) atom. The N(1)-N(2) bond length is 1.34 Å. In the second N site, N(2) is bonded in a water-like geometry to one N(1) and one N(3) atom. The N(2)-N(3) bond length is 1.33 Å. In the third N site, N(3) is bonded in a water-like geometry to one N(2) 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 3-coordinate geometry to one Cd(2), one C(1), and one N(3) atom. In the fifth N site, N(5) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(2), and one C(3) atom. In the sixth N site, N(6) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(2), and one C(5) atom. In the seventh N site, N(7) is bonded in a 3-coordinate geometry to one Cd(1), one C(6), and one N(8) atom. The N(7)-N(8) bond length is 1.35 Å. In the eighth N site, N(8) is bonded in a water-like geometry to one N(7) and one N(9) atom. The N(8)-N(9) bond length is 1.32 Å. In the ninth N site, N(9) is bonded in a water-like geometry to one N(10) and one N(8) atom. The N(9)-N(10) bond length is 1.35 Å. In the tenth N site, N(10) is bonded in a 3-coordinate geometry to one Cd(2), one C(6), and one N(9) atom. In the eleventh N site, N(11) is bonded in a distorted bent 120 degrees geometry to one Cd(2), one C(7), and one C(8) atom. In the twelfth N site, N(12) is bonded in a distorted bent 120 degrees geometry to one Cd(1), one C(10), and one C(7) atom. There are six 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 single-bond geometry to one C(8) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(10) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cd(1), one Cd(2), and one C(11) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one C(11) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Cd(1), one Cd(2), and one C(12) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cd(2) and one C(12) atom. Linkers: 8 c1cnc(C2=NN=N[N]2)nc1 ,4 [O]C(=O)C([O])=O. Metal clusters: 8 [Cd]. The MOF has largest included sphere 3.29 A, density 2.22 g/cm3, surface area 3268.19 m2/g, accessible volume 0.14 cm3/g