The nature of the supramolecular association of 1,2,5-chalcogenadiazoles

Organochalcogen-nitrogen heterocycles such as the 1,2,5-chalcogenadiazoles have a distinct tendency to establish intermolecular links in the solid state through secondary bonding interactions E...N (E=S, Se, Te). Because of its more polar character and lower-lying antibonding orbitals, the tellerium derivatives possess the strongest association energies.