English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/155535
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

Rhodium(I) Complexes with Ligands Based on N-Heterocyclic Carbene and Hemilabile Pyridine Donors as Highly (E)- Stereoselective Alkyne Hydrosilylation Catalysts

AutorMorales-Cerón, Judith; Lara, Patricia ; López-Serrano, Joaquín ; Santos, Laura L. ; Salazar, Veronica; Álvarez, Eleuterio ; Suárez, Andrés
Fecha de publicación2017
EditorAmerican Chemical Society
CitaciónOrganometallics, 36 (13): 2460-2469 (2017)
ResumenCationic rhodium(I) complexes containing picolyl-NHC (NHC = N-heterocyclic carbene) ligands that differ in the substitution at the 6-position of the pyridine donor serve as efficient E-selective alkyne hydrosilylation catalyst precursors. Particularly, when the steric hindrance of the picolyl fragment is increased, a catalyst precursor exhibiting high catalytic activities (TOF up to 500 h–1 at S/C ratios of 1000) and excellent E selectivities (E/α ratio ≥95/5) in the hydrosilylation of a series of aryl, alkyl, and functionalized terminal alkynes with both carbo- and alkoxysilanes has been obtained. The picolyl-NHC ligands in the Rh complexes exhibit a dynamic behavior in solution due to the hemilabile coordination of the pyridine fragment. Preliminary mechanistic studies support the involvement of Rh silyl hydrido species, which are generated in low concentrations from Rh complexes and the silane, in the hydrosilylation of alkynes in agreement with the assumption of Chalk–Harrod-type mechanisms.
Versión del editorhtpp://dx.doi.org/10.1021/acs.organomet.7b00361
URIhttp://hdl.handle.net/10261/155535
DOI10.1021/acs.organomet.7b00361
Aparece en las colecciones: (IIQ) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
Revised Manuscript.pdf484,81 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.