Selected Article


Synthesis of new copper cyanide complexes via the transformation of organonitrile to inorganic cyanide.


International audience

Hydrothermal reaction of diaminomaleonitrile and copper salts under different conditions resulted in copper cyanide coordination polymers {[Cu(H2O)(NH3)4][Cu3(CN)5] · H2O}n (1), {(CH3)4N[Cu(H2O)(NH3)4][Cu4(CN)7]}n (2), and {(CH3OH2)2[Cu2(CN)3]}n (3). 1 and 2 are new mixed-valence Cu(I,II), two 3D organic-inorganic molecular framework complexes that exhibit ionic inclusion. 3 is an open copper cyanide framework hosting a guest molecule. Cyanides in 1, 2, and 3 are produced by in situ C-C bond cleavage of diaminomaleonitrile, and then the remaining product is oxidized to form an oxalate group. The potential porosity of the hydrated coordination polymer 3 was estimated using a computational method based on Connolly's algorithm.