Palladium-Catalyzed Hydrogenation: Detection of Palladium Hydrides.A Joint Study Using Para-Hydrogen-Enhanced NMR Spectroscopy and Density Functional Theory

摘要

Palladium complexes containing two monodentate phosphine ligands are widely used in homogeneous catalysis.Their conversion during catalysis to palladium monophosphine complexes or palladium colloids means that identifying the active catalyst is not straightforward.In the case of hydrogenation,a role for a palladium hydride is often proposed.