Therefore, metal complexes with these ligands show differences in their catalytical and photochemical activity, as well as their luminescence intensity, Stokes shift, and lifetime compared to their carbon-bound counterparts. Some of the rare examples of metal complexes with triazole-linked N-heterocycles bound via the nitrogen atom are triazolylquinoxaline-based rhenium complexes. These complexes have been previously described by Bértrand et al. and have further been explored by our group, employing pyrazine-substituted triazolylquinoxalines and triazolylimidazo-quinoxalines as ligands. The respective stable rhenium complexes are obtained by reaction of Re(CO)5Br with the desired ligand in toluene at 110 °C.