In this contribution, we present a series of chelating ligands that incorporate one pyridine moiety and either a 1,2,3-triazole or the respective triazolylidene. The coordination of these ligands to the rhenium(I) tricarbonyl fragment gives the respective complexes in moderate to good yields. The rhenium complexes were submitted to a broad range of spectroscopic and electrochemical measurements to evaluate the influence of the different coordination sphere on the metal center. Finally, we investigated the catalytic activity of these compounds for CO2 reduction using cyclic voltammetry under CO2 atmosphere. It has been well established that these types of complexes are highly active in this reaction. Selected complexes were therefore submitted to controlled potential experiments, revealing the stability and selectivity of the new electrocatalysts. The results form a comprehensive survey of the donor properties of these types of ligands and their further use in homogeneous catalysis.

1,2,3-Triazole-based chelating ligands under investigation: Tuning the donor strength

253rd National Meeting (2017)

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