Hydroxy-substituted pyridine-like N-heterocycles: Versatile ligands in organometallic catalysis

Bio-inspired complexes with hydroxy-substituted pyridine-like N-heterocyclic ligands have been applied in homogeneous catalysis, especially in transformations related to hydrogen storage. The hydroxy functional group has a significant effect on catalyst activation by acting as an electron donor and/or pendent base. This article presents the design and synthesis of new complexes with pyridine-like N-heterocyclic ligands bearing versatile hydroxy functional groups. Their application for the activation of small molecules such as H ₂, CO₂, and alcohols and their potential contribution to the hydrogen economy are highlighted.