'Click' cycloaddition catalysts: copper(I) and copper(II) tris(triazolylmethyl)amine complexes

The Cu-I complex of the 'click' ligand tris(benzyltriazolylmethyl)amine is an unusual dinuclear dication with one triazole unit bridging two metal centers, and is an effective catalyst for the 'click' cycloaddition reaction.