Cd3(C2N)4 is Indium-like structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four Cd3(C2N)4 clusters. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a tetrahedral geometry to one C(1), one C(2), one C(3), and one C(4) atom. The Cd(1)-C(1) bond length is 2.19 Å. The Cd(1)-C(2) bond length is 2.19 Å. The Cd(1)-C(3) bond length is 2.19 Å. The Cd(1)-C(4) bond length is 2.22 Å. In the second Cd site, Cd(2) is bonded in a distorted L-shaped geometry to two equivalent N(2) atoms. Both Cd(2)-N(2) bond lengths are 2.29 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a linear geometry to one Cd(1) and one N(1) atom. The C(1)-N(1) bond length is 1.13 Å. In the second C site, C(2) is bonded in a linear geometry to one Cd(1) and one N(2) atom. The C(2)-N(2) bond length is 1.12 Å. In the third C site, C(3) is bonded in a single-bond geometry to one Cd(1) atom. In the fourth C site, C(4) is bonded in a single-bond geometry to one Cd(1) atom. There are two inequivalent N sites. In the first N site, N(2) is bonded in a linear geometry to one Cd(2) and one C(2) atom. In the second N site, N(1) is bonded in a distorted single-bond geometry to one C(1) atom. Linkers: 1 [C]#[C]. Metal clusters: . The MOF has largest included sphere 6.18 A, density 1.07 g/cm3, surface area 3196.32 m2/g, accessible volume 0.67 cm3/g