The three-dimensional coordination network in poly[di-μ3-cyanido-μ5-[5-(pyridin-4-yl)tetrazolato]-tricopper(I)]

In the title three‐dimensional tetrazolate‐based coordination polymer, poly[bis(μ3‐cyanido‐κ3N:C:C)[μ5‐5‐(pyridin‐4‐yl)tetrazolato‐κ5N:N′:N′′:N′′′:N′′′′]tricopper(I)], [Cu3(C6H4N5)(CN)2]n, there are two types of coordinated CuI atoms. One type exhibits a tetrahedral environment and the other, residing on a twofold axis, adopts a trigonal coordination environment. The closest Cu...Cu distance is only 2.531 (2) Å, involving a bridging cyanide C atom. All four tetrazolate and the pyridine N atom of the 4‐(pyridin‐4‐yl)‐1H‐tetrazolate anion are coordinated to these CuI atoms and exhibit a μ5‐bridging mode. The three‐dimensional coordination network can be topologically simplified as a rarely observed (3,3,4,5)‐connected network with the Schläfli symbol (4.6.84)2.(42.6.87).(6.82)3.