CdC8H4(NO)4 crystallizes in the monoclinic C2 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a distorted pentagonal planar geometry to one N(1), one N(4), one N(5), one O(1), and one O(8) atom. The Cd(1)-N(1) bond length is 2.25 Å. The Cd(1)-N(4) bond length is 2.27 Å. The Cd(1)-N(5) bond length is 2.33 Å. The Cd(1)-O(1) bond length is 2.28 Å. The Cd(1)-O(8) bond length is 2.49 Å. In the second Cd site, Cd(2) is bonded in a distorted pentagonal planar geometry to one N(2), one N(3), one N(6), one O(2), and one O(7) atom. The Cd(2)-N(2) bond length is 2.25 Å. The Cd(2)-N(3) bond length is 2.27 Å. The Cd(2)-N(6) bond length is 2.33 Å. The Cd(2)-O(2) bond length is 2.29 Å. The Cd(2)-O(7) bond length is 2.49 Å. There are sixteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(1), and one O(3) atom. The C(1)-C(3) bond length is 1.47 Å. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(3) bond length is 1.28 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(2), and one O(4) atom. The C(2)-C(4) bond length is 1.47 Å. The C(2)-O(2) bond length is 1.28 Å. The C(2)-O(4) bond length is 1.28 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one N(1) atom. The C(3)-C(5) bond length is 1.41 Å. The C(3)-N(1) bond length is 1.36 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one N(2) atom. The C(4)-C(6) bond length is 1.41 Å. The C(4)-N(2) bond length is 1.36 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(3), one C(7), and one N(3) atom. The C(5)-C(7) bond length is 1.47 Å. The C(5)-N(3) bond length is 1.37 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(4), one C(8), and one N(4) atom. The C(6)-C(8) bond length is 1.47 Å. The C(6)-N(4) bond length is 1.37 Å. In the seventh C site, C(7) is bonded in a bent 120 degrees geometry to one C(5), one O(5), and one O(7) atom. The C(7)-O(5) bond length is 1.32 Å. The C(7)-O(7) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a bent 120 degrees geometry to one C(6), one O(6), and one O(8) atom. The C(8)-O(6) bond length is 1.32 Å. The C(8)-O(8) bond length is 1.25 Å. In the ninth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(11), one N(1), and one N(3) atom. The C(9)-C(11) bond length is 1.45 Å. The C(9)-N(1) bond length is 1.35 Å. The C(9)-N(3) bond length is 1.35 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(12), one N(2), and one N(4) atom. The C(10)-C(12) bond length is 1.45 Å. The C(10)-N(2) bond length is 1.35 Å. The C(10)-N(4) bond length is 1.35 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(13), one C(9), and one N(5) atom. The C(11)-C(13) bond length is 1.38 Å. The C(11)-N(5) bond length is 1.39 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(10), one C(14), and one N(6) atom. The C(12)-C(14) bond length is 1.38 Å. The C(12)-N(6) bond length is 1.39 Å. In the thirteenth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(11); one N(7,8); and one H(1,2) atom. The C(13)-N(7,8) bond length is 1.37 Å. The C(13)-H(1,2) bond length is 1.08 Å. In the fourteenth C site, C(14) is bonded in a distorted bent 120 degrees geometry to one C(12); one N(7,8); and one H(1,2) atom. The C(14)-N(7,8) bond length is 1.37 Å. The C(14)-H(1,2) bond length is 1.08 Å. In the fifteenth C site, C(15) is bonded in a trigonal planar geometry to one N(5); one N(7,8); and one H(3,4) atom. The C(15)-N(5) bond length is 1.33 Å. The C(15)-N(7,8) bond length is 1.36 Å. The C(15)-H(3,4) bond length is 1.09 Å. In the sixteenth C site, C(16) is bonded in a trigonal planar geometry to one N(6); one N(7,8); and one H(3,4) atom. The C(16)-N(6) bond length is 1.33 Å. The C(16)-N(7,8) bond length is 1.36 Å. The C(16)-H(3,4) bond length is 1.09 Å. There are seven inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(3), and one C(9) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(10), and one C(4) atom. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(5), and one C(9) atom. In the fourth N site, N(4) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(10), and one C(6) atom. In the fifth N site, N(5) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(11), and one C(15) atom. In the sixth N site, N(6) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(12), and one C(16) atom. In the seventh N site, N(7,8) is bonded in a trigonal planar geometry to one C(13), one C(15), and one H(5) atom. The N(7,8)-H(5) bond length is 1.03 Å. There are six inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one C(13) atom. In the second H site, H(3,4) is bonded in a single-bond geometry to one C(15) atom. In the third H site, H(5) is bonded in a single-bond geometry to one N(7,8) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one N(7,8) atom. The H(6)-N(7,8) bond length is 1.03 Å. In the fifth H site, H(7) is bonded in a linear geometry to one O(3) and one O(5) atom. The H(7)-O(3) bond length is 1.46 Å. The H(7)-O(5) bond length is 1.05 Å. In the sixth H site, H(8) is bonded in a linear geometry to one O(4) and one O(6) atom. The H(8)-O(4) bond length is 1.46 Å. The H(8)-O(6) bond length is 1.05 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Cd(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Cd(2) and one C(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one C(1) and one H(7) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one C(2) and one H(8) atom. In the fifth O site, O(5) is bonded in a water-like geometry to one C(7) and one H(7) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one C(8) and one H(8) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Cd(2) and one C(7) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Cd(1) and one C(8) atom. Linkers: 4 [O]C(=O)C1=C(C(=O)O)[N]C(c2c[nH]cn2)=N1 ,1 O=[C]C1=C([C]=O)N=C(c2c[nH]cn2)[N]1 ,1 [C][N]C(=[CH])C1=NC(C([O])=O)=C(C(=O)O)[N]1. Metal clusters: 4 [Cd]. The MOF has largest included sphere 2.96 A, density 2.30 g/cm3, surface area 3066.54 m2/g, accessible volume 0.11 cm3/g