Cd9C18H12(N15O8)2 crystallizes in the triclinic P-1 space group. There are five inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one N(13), one N(7), one N(9), one O(4), one O(6), and one O(7) atom to form corner-sharing CdN3O3 octahedra. The corner-sharing octahedral tilt angles range from 72-73°. The Cd(1)-N(13) bond length is 2.31 Å. The Cd(1)-N(7) bond length is 2.35 Å. The Cd(1)-N(9) bond length is 2.26 Å. The Cd(1)-O(4) bond length is 2.38 Å. The Cd(1)-O(6) bond length is 2.30 Å. The Cd(1)-O(7) bond length is 2.21 Å. In the second Cd site, Cd(2) is bonded in a rectangular see-saw-like geometry to one N(14), one N(15), one O(2), and one O(5) atom. The Cd(2)-N(14) bond length is 2.37 Å. The Cd(2)-N(15) bond length is 2.28 Å. The Cd(2)-O(2) bond length is 2.35 Å. The Cd(2)-O(5) bond length is 2.30 Å. In the third Cd site, Cd(3) is bonded to one N(1), one N(11), one N(9), one O(3), one O(6), and one O(8) atom to form corner-sharing CdN3O3 octahedra. The corner-sharing octahedral tilt angles range from 72-73°. The Cd(3)-N(1) bond length is 2.35 Å. The Cd(3)-N(11) bond length is 2.45 Å. The Cd(3)-N(9) bond length is 2.33 Å. The Cd(3)-O(3) bond length is 2.31 Å. The Cd(3)-O(6) bond length is 2.27 Å. The Cd(3)-O(8) bond length is 2.25 Å. In the fourth Cd site, Cd(4) is bonded in a 6-coordinate geometry to one N(10), one N(12), one O(1), one O(4), one O(5), and one O(6) atom. The Cd(4)-N(10) bond length is 2.30 Å. The Cd(4)-N(12) bond length is 2.24 Å. The Cd(4)-O(1) bond length is 2.58 Å. The Cd(4)-O(4) bond length is 2.44 Å. The Cd(4)-O(5) bond length is 2.30 Å. The Cd(4)-O(6) bond length is 2.22 Å. In the fifth Cd site, Cd(5) is bonded in an octahedral geometry to two equivalent N(6), two equivalent O(1), and two equivalent O(5) atoms. Both Cd(5)-N(6) bond lengths are 2.35 Å. Both Cd(5)-O(1) bond lengths are 2.28 Å. Both Cd(5)-O(5) bond lengths are 2.26 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(7), one N(10), and one N(14) atom. The C(1)-C(7) bond length is 1.49 Å. The C(1)-N(10) bond length is 1.32 Å. The C(1)-N(14) bond length is 1.33 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(6), one N(11), and one N(12) atom. The C(2)-C(6) bond length is 1.49 Å. The C(2)-N(11) bond length is 1.33 Å. The C(2)-N(12) bond length is 1.35 Å. In the third C site, C(3) is bonded in a water-like geometry to one C(5) and two equivalent H(5,6) atoms. The C(3)-C(5) bond length is 1.49 Å. Both C(3)-H(5,6) bond lengths are 0.97 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(4)-O(1) bond length is 1.27 Å. The C(4)-O(2) bond length is 1.25 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(3), one N(1), and one N(15) atom. The C(5)-N(1) bond length is 1.32 Å. The C(5)-N(15) bond length is 1.33 Å. In the sixth C site, C(6) is bonded in a water-like geometry to one C(2) and two equivalent H(2,4) atoms. Both C(6)-H(2,4) bond lengths are 0.97 Å. In the seventh C site, C(7) is bonded in a water-like geometry to one C(1) and two equivalent H(1,3) atoms. Both C(7)-H(1,3) bond lengths are 0.97 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(8) atom. The C(8)-O(4) bond length is 1.27 Å. The C(8)-O(8) bond length is 1.23 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(7) atom. The C(9)-O(3) bond length is 1.26 Å. The C(9)-O(7) bond length is 1.24 Å. There are fifteen inequivalent N sites. In the first N site, N(1) is bonded in a 3-coordinate geometry to one Cd(3), one C(5), and one N(7) atom. The N(1)-N(7) bond length is 1.36 Å. In the second N site, N(2) is bonded in a water-like geometry to one N(12) and one N(13) atom. The N(2)-N(12) bond length is 1.34 Å. The N(2)-N(13) bond length is 1.31 Å. In the third N site, N(3) is bonded in a water-like geometry to one N(15) and one N(7) atom. The N(3)-N(15) bond length is 1.35 Å. The N(3)-N(7) bond length is 1.30 Å. In the fourth N site, N(4) is bonded in a linear geometry to one N(5) and one N(9) atom. The N(4)-N(5) bond length is 1.12 Å. The N(4)-N(9) bond length is 1.18 Å. In the fifth N site, N(5) is bonded in a single-bond geometry to one N(4) atom. In the sixth N site, N(6) is bonded in a trigonal planar geometry to one Cd(5), one N(14), and one N(8) atom. The N(6)-N(14) bond length is 1.34 Å. The N(6)-N(8) bond length is 1.30 Å. In the seventh N site, N(7) is bonded in a distorted trigonal planar geometry to one Cd(1), one N(1), and one N(3) atom. In the eighth N site, N(8) is bonded in a water-like geometry to one N(10) and one N(6) atom. The N(8)-N(10) bond length is 1.34 Å. In the ninth N site, N(9) is bonded in a trigonal planar geometry to one Cd(1), one Cd(3), and one N(4) atom. In the tenth N site, N(10) is bonded in a distorted trigonal planar geometry to one Cd(4), one C(1), and one N(8) atom. In the eleventh N site, N(11) is bonded in a 3-coordinate geometry to one Cd(3), one C(2), and one N(13) atom. The N(11)-N(13) bond length is 1.35 Å. In the twelfth N site, N(12) is bonded in a distorted trigonal planar geometry to one Cd(4), one C(2), and one N(2) atom. In the thirteenth N site, N(13) is bonded in a trigonal planar geometry to one Cd(1), one N(11), and one N(2) atom. In the fourteenth N site, N(14) is bonded in a 3-coordinate geometry to one Cd(2), one C(1), and one N(6) atom. In the fifteenth N site, N(15) is bonded in a 3-coordinate geometry to one Cd(2), one C(5), and one N(3) atom. There are three inequivalent H sites. In the first H site, H(1,3) is bonded in a single-bond geometry to one C(7) atom. In the second H site, H(2,4) is bonded in a single-bond geometry to one C(6) atom. In the third H site, H(5,6) is bonded in a single-bond geometry to one C(3) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Cd(4), one Cd(5), and one C(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cd(2) and one C(4) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cd(3) and one C(9) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Cd(1), one Cd(4), and one C(8) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Cd(2), one Cd(4), and one Cd(5) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Cd(1), one Cd(3), and one Cd(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Cd(1) and one C(9) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Cd(3) and one C(8) atom. Linkers: 6 [O]C(=O)CC1=NN=N[N]1. Metal clusters: 9 [Cd]. The MOF has largest included sphere 3.89 A, density 2.64 g/cm3, surface area 2579.39 m2/g, accessible volume 0.09 cm3/g