Investigation of Cyclam Based Re‐Complexes as Potential Electrocatalysts for the CO2 Reduction Reaction

Among the various homogenous electrocatalysts, especially Re(bpy)(CO)(3)Cl and [Ni(cyclam)](2+) were shown to be highly efficient for the selective conversion of CO2 to CO at moderate potentials. However, a purposeful combination of a Re-I tricarbonyl unit with a cyclam ligand hitherto received no attention. Herein, we report on a series of cyclam based Re complexes comprising the original {N-4} as well as heteroatom-altered ligand frameworks, describe their synthesis, reveal their coordination behavior and furthermore investigate their performance towards the electrochemical CO2 reduction.