CdC15N5H9O4 crystallizes in the monoclinic P2_1/c space group. Cd(1) is bonded in a distorted pentagonal bipyramidal geometry to one N(2), one N(3), one N(5), one O(1), one O(2), one O(3), and one O(4) atom. The Cd(1)-N(2) bond length is 2.35 Å. The Cd(1)-N(3) bond length is 2.39 Å. The Cd(1)-N(5) bond length is 2.41 Å. The Cd(1)-O(1) bond length is 2.58 Å. The Cd(1)-O(2) bond length is 2.33 Å. The Cd(1)-O(3) bond length is 2.59 Å. The Cd(1)-O(4) bond length is 2.35 Å. There are fifteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(1), and one O(2) atom. The C(1)-C(4) bond length is 1.51 Å. The C(1)-O(1) bond length is 1.26 Å. The C(1)-O(2) bond length is 1.29 Å. In the second C site, C(2) is bonded in a bent 120 degrees geometry to one C(5), one O(3), and one O(4) atom. The C(2)-C(5) bond length is 1.51 Å. The C(2)-O(3) bond length is 1.26 Å. The C(2)-O(4) bond length is 1.28 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(4), one C(5), and one H(1) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-C(5) bond length is 1.40 Å. The C(3)-H(1) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(6) atom. The C(4)-C(6) bond length is 1.40 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(7) atom. The C(5)-C(7) bond length is 1.40 Å. In the sixth C site, C(6) is bonded in a distorted single-bond geometry to one C(4), one C(8), and one H(2) atom. The C(6)-C(8) bond length is 1.39 Å. The C(6)-H(2) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(5), one C(8), and one H(3) atom. The C(7)-C(8) bond length is 1.39 Å. The C(7)-H(3) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted trigonal planar geometry to one C(6), one C(7), and one N(1) atom. The C(8)-N(1) bond length is 1.44 Å. In the ninth C site, C(9) is bonded in a distorted trigonal non-coplanar geometry to one C(10), one H(4), one H(5), and one H(6) atom. The C(9)-C(10) bond length is 1.48 Å. The C(9)-H(4) bond length is 1.10 Å. The C(9)-H(5) bond length is 1.10 Å. The C(9)-H(6) bond length is 1.10 Å. In the tenth C site, C(10) is bonded in a distorted trigonal planar geometry to one C(9), one N(1), and one N(2) atom. The C(10)-N(1) bond length is 1.37 Å. The C(10)-N(2) bond length is 1.33 Å. In the eleventh C site, C(11) is bonded in a distorted water-like geometry to one C(12), one N(1), and one N(3) atom. The C(11)-C(12) bond length is 1.47 Å. The C(11)-N(1) bond length is 1.38 Å. The C(11)-N(3) bond length is 1.33 Å. In the twelfth C site, C(12) is bonded in a distorted trigonal planar geometry to one C(11), one N(4), and one N(5) atom. The C(12)-N(4) bond length is 1.34 Å. The C(12)-N(5) bond length is 1.35 Å. In the thirteenth C site, C(13) is bonded in a distorted bent 120 degrees geometry to one C(14), one N(4), and one H(7) atom. The C(13)-C(14) bond length is 1.40 Å. The C(13)-N(4) bond length is 1.34 Å. The C(13)-H(7) bond length is 1.09 Å. In the fourteenth C site, C(14) is bonded in a distorted trigonal planar geometry to one C(13), one C(15), and one H(8) atom. The C(14)-C(15) bond length is 1.39 Å. The C(14)-H(8) bond length is 1.09 Å. In the fifteenth C site, C(15) is bonded in a distorted bent 120 degrees geometry to one C(14), one N(5), and one H(9) atom. The C(15)-N(5) bond length is 1.34 Å. The C(15)-H(9) bond length is 1.09 Å. There are five 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 C(8) atom. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(10), and one N(3) atom. The N(2)-N(3) bond length is 1.36 Å. In the third N site, N(3) is bonded in a 3-coordinate geometry to one Cd(1), one C(11), and one N(2) atom. In the fourth N site, N(4) is bonded in a bent 120 degrees geometry to one C(12) and one C(13) atom. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one Cd(1), one C(12), and one C(15) atom. There are nine inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(9) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(9) atom. In the seventh H site, H(7) is bonded in a single-bond geometry to one C(13) atom. In the eighth H site, H(8) is bonded in a single-bond geometry to one C(14) atom. In the ninth H site, H(9) is bonded in a single-bond geometry to one C(15) atom. There are four inequivalent O sites. In the first O site, O(3) is bonded in a distorted single-bond geometry to one Cd(1) and one C(2) atom. In the second O site, O(4) is bonded in a distorted L-shaped geometry to one Cd(1) and one C(2) atom. In the third O site, O(1) is bonded in a distorted single-bond geometry to one Cd(1) and one C(1) atom. In the fourth O site, O(2) is bonded in a distorted L-shaped geometry to one Cd(1) and one C(1) atom. Linkers: 4 Cc1nnc(-c2ncccn2)n1-c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 2 O=[C]O[Cd]1(O[C]=O)N=N[Cd](O[C]=O)(O[C]=O)N=N1. The MOF has largest included sphere 5.13 A, density 1.31 g/cm3, surface area 3800.75 m2/g, accessible volume 0.34 cm3/g