Resumen: Olefin hydrophosphanation is an attractive route for the atom-economical synthesis of functionalized phosphanes. This reaction involves the formation of P-C and H-C bonds. Thus, complexes that contain both hydrido and phosphanido functionalities are of great interest for the development of effective and fast catalysts. Herein, we showcase the excellent activity of one of them, [Rh(Tp)H(PMe3)(PPh2)] (1), in the hydrophosphanation of a wide range of olefins. In addition to the required nucleophilicity of the phosphanido moiety to accomplish the P-C bond formation, the key role of the hydride ligand in 1 has been disclosed by both experimental results and DFT calculations. An additional Rh-H··· C stabilization in some intermediates or transition states favors the hydrogen transfer reaction from rhodium to carbon to form the H-C bond. Further support for our proposal arises from the poor activity exhibited by the related chloride complex [Rh(Tp)Cl(PMe3)(PPh2)] as well as from stoichiometric and kinetic studies. Idioma: Inglés DOI: 10.1021/jacs.0c11010 Año: 2021 Publicado en: Journal of the American Chemical Society 143, 1 (2021), 349-358 ISSN: 0002-7863 Factor impacto JCR: 16.383 (2021) Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 16 / 180 = 0.089 (2021) - Q1 - T1 Factor impacto CITESCORE: 25.2 - Chemical Engineering (Q1) - Biochemistry, Genetics and Molecular Biology (Q1)