Cd2C18N3H13O7 crystallizes in the triclinic P-1 space group. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one N(2), one N(3), one O(2), one O(4), one O(6), and one O(7) atom to form corner-sharing CdN2O4 octahedra. The corner-sharing octahedral tilt angles range from 59-78°. The Cd(1)-N(2) bond length is 2.36 Å. The Cd(1)-N(3) bond length is 2.34 Å. The Cd(1)-O(2) bond length is 2.36 Å. The Cd(1)-O(4) bond length is 2.36 Å. The Cd(1)-O(6) bond length is 2.44 Å. The Cd(1)-O(7) bond length is 2.23 Å. In the second Cd site, Cd(2) is bonded to one N(1), one O(1), one O(3), one O(5), and two equivalent O(7) atoms to form CdNO5 octahedra that share corners with two equivalent Cd(1)N2O4 octahedra and  an edgeedge with one Cd(2)NO5 octahedra. The corner-sharing octahedral tilt angles range from 59-78°. The Cd(2)-N(1) bond length is 2.40 Å. The Cd(2)-O(1) bond length is 2.36 Å. The Cd(2)-O(3) bond length is 2.35 Å. The Cd(2)-O(5) bond length is 2.37 Å. There is one shorter (2.25 Å) and one longer (2.40 Å) Cd(2)-O(7) bond length. There are eighteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(1), and one H(1) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-N(1) bond length is 1.35 Å. The C(1)-H(1) bond length is 1.09 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one H(2) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-H(2) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(3) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(3) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(6) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-C(6) bond length is 1.51 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one H(4) atom. The C(5)-N(1) bond length is 1.34 Å. The C(5)-H(4) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(1), and one O(2) atom. The C(6)-O(1) bond length is 1.27 Å. The C(6)-O(2) bond length is 1.27 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(8), one N(2), and one H(5) atom. The C(7)-C(8) bond length is 1.39 Å. The C(7)-N(2) bond length is 1.34 Å. The C(7)-H(5) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(7), one C(9), and one H(6) atom. The C(8)-C(9) bond length is 1.39 Å. The C(8)-H(6) 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(7) atom. The C(9)-C(10) bond length is 1.40 Å. The C(9)-H(7) bond length is 1.09 Å. In the tenth C site, C(10) is bonded in a trigonal planar geometry to one C(11), one C(12), and one C(9) atom. The C(10)-C(11) bond length is 1.40 Å. The C(10)-C(12) bond length is 1.51 Å. In the eleventh C site, C(11) is bonded in a distorted trigonal planar geometry to one C(10), one N(2), and one H(8) atom. The C(11)-N(2) bond length is 1.34 Å. The C(11)-H(8) bond length is 1.09 Å. In the twelfth C site, C(12) is bonded in a distorted bent 120 degrees geometry to one C(10), one O(3), and one O(4) atom. The C(12)-O(3) bond length is 1.28 Å. The C(12)-O(4) bond length is 1.26 Å. In the thirteenth C site, C(13) is bonded in a distorted trigonal planar geometry to one C(14), one N(3), and one H(9) atom. The C(13)-C(14) bond length is 1.39 Å. The C(13)-N(3) bond length is 1.35 Å. The C(13)-H(9) bond length is 1.09 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(13) and one H(10) atom. The C(14)-H(10) bond length is 1.09 Å. In the fifteenth C site, C(15) is bonded in a distorted single-bond geometry to one C(16) and one H(11) atom. The C(15)-C(16) bond length is 1.40 Å. The C(15)-H(11) bond length is 1.09 Å. In the sixteenth C site, C(16) is bonded in a trigonal planar geometry to one C(15), one C(17), and one C(18) atom. The C(16)-C(17) bond length is 1.40 Å. The C(16)-C(18) bond length is 1.51 Å. In the seventeenth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one C(16), one N(3), and one H(12) atom. The C(17)-N(3) bond length is 1.34 Å. The C(17)-H(12) bond length is 1.09 Å. In the eighteenth C site, C(18) is bonded in a distorted bent 120 degrees geometry to one C(16), one O(5), and one O(6) atom. The C(18)-O(5) bond length is 1.27 Å. The C(18)-O(6) bond length is 1.27 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cd(2), one C(1), and one C(5) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cd(1), one C(11), and one C(7) atom. In the third N site, N(3) is bonded in a trigonal planar geometry to one Cd(1), one C(13), and one C(17) atom. There are thirteen inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(7) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(8) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(9) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(11) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(13) atom. In the tenth H site, H(10) is bonded in a single-bond geometry to one C(14) atom. In the eleventh H site, H(11) is bonded in a single-bond geometry to one C(15) atom. In the twelfth H site, H(12) is bonded in a single-bond geometry to one C(17) atom. In the thirteenth H site, H(13) is bonded in a single-bond geometry to one O(7) atom. The H(13)-O(7) bond length is 0.97 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cd(2) and one C(6) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one C(6) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cd(2) and one C(12) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Cd(1) and one C(12) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Cd(2) and one C(18) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Cd(1) and one C(18) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Cd(1), two equivalent Cd(2), and one H(13) atom. Linkers: 6 [O]C(=O)c1cccnc1. Metal clusters: 1 O[Cd@]12O[C]O[Cd](O[C]O1)O[C]O[Cd@]1(O)O[C]O[Cd](O[C]O2)O[C]O1. The MOF has largest included sphere 2.27 A, density 2.15 g/cm3, surface area 3461.70 m2/g, accessible volume 0.08 cm3/g