CdC9H5(NO3)2CO is Indium-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four formaldehyde molecules and two CdC9H5(NO3)2 clusters. In each CdC9H5(NO3)2 cluster, Cd(1) is bonded in a distorted pentagonal bipyramidal geometry to one N(1), one N(2), one O(1), one O(2), one O(3), one O(4), and one O(7) atom. The Cd(1)-N(1) bond length is 2.39 Å. The Cd(1)-N(2) bond length is 2.39 Å. The Cd(1)-O(1) bond length is 2.56 Å. The Cd(1)-O(2) bond length is 2.30 Å. The Cd(1)-O(3) bond length is 2.46 Å. The Cd(1)-O(4) bond length is 2.39 Å. The Cd(1)-O(7) bond length is 2.36 Å. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one O(1) atom. The C(1)-O(1) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one O(2) atom. The C(2)-O(2) bond length is 1.26 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one O(3) atom. The C(3)-O(3) bond length is 1.26 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one O(4) atom. The C(4)-O(4) bond length is 1.26 Å. In the fifth C site, C(5) is bonded in a single-bond geometry to one O(5) atom. The C(5)-O(5) bond length is 1.25 Å. In the sixth C site, C(7) is bonded in a distorted trigonal planar geometry to one C(8), one N(1), and one H(3) atom. The C(7)-C(8) bond length is 1.39 Å. The C(7)-N(1) bond length is 1.34 Å. The C(7)-H(3) bond length is 1.09 Å. In the seventh C site, C(8) is bonded in a distorted trigonal planar geometry to one C(7), one C(9), and one H(4) atom. The C(8)-C(9) bond length is 1.39 Å. The C(8)-H(4) bond length is 1.09 Å. In the eighth C site, C(9) is bonded in a distorted trigonal planar geometry to one C(8), one N(2), and one H(5) atom. The C(9)-N(2) bond length is 1.35 Å. The C(9)-H(5) bond length is 1.09 Å. In the ninth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one N(1) and one N(2) atom. The C(10)-N(1) bond length is 1.34 Å. The C(10)-N(2) bond length is 1.34 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Cd(1), one C(10), and one C(7) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Cd(1), one C(10), and one C(9) atom. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(7) atom. The H(1)-O(7) bond length is 0.97 Å. In the second H site, H(2) is bonded in a distorted bent 150 degrees geometry to one O(5) and one O(7) atom. The H(2)-O(5) bond length is 1.65 Å. The H(2)-O(7) bond length is 1.00 Å. 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(8) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(9) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Cd(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cd(1) and one C(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Cd(1) and one C(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cd(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one C(5) and one H(2) atom. In the sixth O site, O(7) is bonded in a distorted water-like geometry to one Cd(1), one H(1), and one H(2) atom. Linkers: 2 c1cnc(-c2ncccn2)nc1 ,2 [c]1cnc(-c2ncccn2)nc1 ,4 O=C1C(=O)C(=O)C(=O)C(=O)C1=O. Metal clusters: 4 [Cd]. The MOF has largest included sphere 2.31 A, density 2.13 g/cm3, surface area 3114.11 m2/g, accessible volume 0.12 cm3/g