Cd3C24H18(N2O7)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 to one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form distorted corner-sharing CdO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 76°. The Cd(1)-O(2) bond length is 2.21 Å. The Cd(1)-O(3) bond length is 2.25 Å. The Cd(1)-O(5) bond length is 2.26 Å. The Cd(1)-O(6) bond length is 2.49 Å. The Cd(1)-O(7) bond length is 2.31 Å. In the second Cd site, Cd(2) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(7) atoms to form corner-sharing CdO6 octahedra. Both Cd(2)-O(1) bond lengths are 2.27 Å. Both Cd(2)-O(4) bond lengths are 2.25 Å. Both Cd(2)-O(7) bond lengths are 2.32 Å. There are twelve inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(6), and one C(7) atom. The C(1)-C(2) bond length is 1.38 Å. The C(1)-C(6) bond length is 1.40 Å. The C(1)-C(7) bond length is 1.51 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.38 Å. The C(2)-H(1) bond length is 0.93 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(8) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-C(8) bond length is 1.51 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 0.93 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(9) atom. The C(5)-C(6) bond length is 1.38 Å. The C(5)-C(9) bond length is 1.50 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one H(3) atom. The C(6)-H(3) bond length is 0.93 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(2) atom. The C(7)-O(1) bond length is 1.25 Å. The C(7)-O(2) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.23 Å. The C(8)-O(4) bond length is 1.26 Å. In the ninth C site, C(9) is bonded in a bent 120 degrees geometry to one C(5), one O(5), and one O(6) atom. The C(9)-O(5) bond length is 1.25 Å. The C(9)-O(6) bond length is 1.25 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one N(1), one N(2), and one O(7) atom. The C(10)-N(1) bond length is 1.31 Å. The C(10)-N(2) bond length is 1.31 Å. The C(10)-O(7) bond length is 1.27 Å. In the eleventh C site, C(11) is bonded in a 3-coordinate geometry to one N(1) and two equivalent H(4,5) atoms. The C(11)-N(1) bond length is 1.47 Å. Both C(11)-H(4,5) bond lengths are 0.97 Å. In the twelfth C site, C(12) is bonded in a 3-coordinate geometry to one N(2) and two equivalent H(6,7) atoms. The C(12)-N(2) bond length is 1.47 Å. Both C(12)-H(6,7) bond lengths are 0.97 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one C(10), one C(11), and one H(8) atom. The N(1)-H(8) bond length is 0.86 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one C(10), one C(12), and one H(9) atom. The N(2)-H(9) bond length is 0.86 Å. There are seven 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(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(4,5) is bonded in a single-bond geometry to one C(11) atom. In the fifth H site, H(6,7) is bonded in a single-bond geometry to one C(12) atom. In the sixth H site, H(8) is bonded in a single-bond geometry to one N(1) atom. In the seventh H site, H(9) is bonded in a single-bond geometry to one N(2) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Cd(2) and one C(7) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cd(1) and one C(7) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cd(1) and one C(8) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Cd(2) and one C(8) atom. In the fifth O site, O(5) is bonded in a distorted L-shaped geometry to one Cd(1) and one C(9) atom. In the sixth O site, O(6) is bonded in a distorted L-shaped geometry to one Cd(1) and one C(9) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Cd(1), one Cd(2), and one C(10) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 6 [Cd]. The MOF has largest included sphere 5.79 A, density 1.42 g/cm3, surface area 3345.76 m2/g, accessible volume 0.35 cm3/g