Résumé
Polyhydride ruthenium complexes, and particularly those incorporating one or two dihydrogen ligands, are attractive species. The dihydrogen ligand is labile or/and prepares the metal center for hydrogen transfer processes [1]. Activation and functionalization of small molecules are highly desirable as broad applications in the fields of catalysis and energy are expected. Selected recent examples from our group will be detailed with a special focus on mechanistic issues dealing with some important catalytic transformations such as hydrogenation/dehydrogenation reactions, isotopic labeling and CO2 functionalization.