Several experiments of copper(II)-template synthesis were also performed in the presence of different aromatic amides as LFs, namely benzamide, 4-nitrobenzamide, nicotinamide and isonicotinamide. The corresponding macrocyclic compounds were not isolated even if a slight blue-violet colour, such as expected for copper(II) diazacyclam complexes, was observed in the reaction mixture after addition of excess acid, suggesting that macrocyclic species formed only in traces.