Cd3C12H14(NO4)4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one N(2), one O(1), one O(2), one O(5), one O(6), and one O(7) atom to form corner-sharing CdNO5 octahedra. The corner-sharing octahedral tilt angles are 68°. The Cd(1)-N(2) bond length is 2.30 Å. The Cd(1)-O(1) bond length is 2.29 Å. The Cd(1)-O(2) bond length is 2.36 Å. The Cd(1)-O(5) bond length is 2.39 Å. The Cd(1)-O(6) bond length is 2.34 Å. The Cd(1)-O(7) bond length is 2.28 Å. In the second Cd site, Cd(2) is bonded to two equivalent N(1), two equivalent O(2), and two equivalent O(8) atoms to form corner-sharing CdN2O4 octahedra. The corner-sharing octahedral tilt angles are 68°. Both Cd(2)-N(1) bond lengths are 2.26 Å. Both Cd(2)-O(2) bond lengths are 2.41 Å. Both Cd(2)-O(8) bond lengths are 2.39 Å. There are six inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one N(1), one N(2), and one O(1) atom. The C(1)-N(1) bond length is 1.37 Å. The C(1)-N(2) bond length is 1.37 Å. The C(1)-O(1) bond length is 1.26 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(3), one C(4), and one N(1) atom. The C(2)-C(3) bond length is 1.53 Å. The C(2)-C(4) bond length is 1.40 Å. The C(2)-N(1) bond length is 1.34 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(2), and one O(3) atom. The C(3)-O(2) bond length is 1.29 Å. The C(3)-O(3) bond length is 1.25 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(2), one C(5), and one H(1) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-H(1) bond length is 1.08 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one C(6), and one N(2) atom. The C(5)-C(6) bond length is 1.52 Å. The C(5)-N(2) bond length is 1.34 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(4), and one O(5) atom. The C(6)-O(4) bond length is 1.26 Å. The C(6)-O(5) bond length is 1.28 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Cd(2), 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(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(4) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one O(3) and one O(6) atom. The H(2)-O(3) bond length is 1.67 Å. The H(2)-O(6) bond length is 1.00 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(6) atom. The H(3)-O(6) bond length is 0.99 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(7) atom. The H(4)-O(7) bond length is 1.00 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(7) atom. The H(5)-O(7) bond length is 0.98 Å. In the sixth H site, H(6) is bonded in a distorted single-bond geometry to one O(5) and one O(8) atom. The H(6)-O(5) bond length is 1.66 Å. The H(6)-O(8) bond length is 1.01 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(8) atom. The H(7)-O(8) bond length is 0.99 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Cd(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cd(1), one Cd(2), and one C(3) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one C(3) and one H(2) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one C(6) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(6), and one H(6) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to one Cd(1), one H(2), and one H(3) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one Cd(1), one H(4), and one H(5) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one Cd(2), one H(6), and one H(7) atom. Linkers: 4 [O]C(=O)C1=NC(=O)N=C(C([O])=O)[CH]1. Metal clusters: 6 [Cd]. The MOF has largest included sphere 2.50 A, density 2.60 g/cm3, surface area 2679.77 m2/g, accessible volume 0.08 cm3/g