Por favor, use este identificador para citar o enlazar este ítem:http://uvadoc.uva.es/handle/10324/42910
Título
Experimental and DFT Study of the [AuAr(AsPh3)]-Catalyzed cis/trans Isomerization of [PdAr2(AsPh3)2] (Ar = C6F5 or C6Cl2F3): Alternative Mechanisms and Its Switch upon Pt for Pd Substitution
Autor
Año del Documento
2020
Editorial
American Chemical Society
Descripción
Producción Científica
Documento Fuente
Organometallics 2020, 39, 12, 2295–2303
Resumen
The aryl transmetalation processes between cis-[PdRf2(AsPh3)2] (Rf = C6Cl2F3) and [AuPf(AsPh3)] (Pf = C6F5) has been studied experimentally and by DFT calculations. Aryl exchange with or without isomerization of the Pd geometry occurs by ligand displacement of one AsPh3 ligand by an [AuAr(AsPh3)] molecule, which coordinates using the Au–Ar bond electron density, followed or not by a second switch to the next aryl (Ar) group. The transition states are bridged Ar–Au(AsPh3)–Ar′ structures with fairly planar geometries. Alternatively, a direct switch of the Au(AsPh3) fragment to either cis or trans Ar groups on Pd can be achieved from a square-pyramidal [(AsPh3)Au-PdAr3(AsPh3)] intermediate or transition state. The later pathway is less favorable for the case studied (M = Pd), but it is preferred for the same chemical system with M = Pt. The study provides some clues on exchanges that can be relevant in organic syntheses catalyzed by bimetallic systems.
ISSN
0276-7333
Revisión por pares
SI
Patrocinador
Ministerio de Economía, Industria y Competitividad (projects CTQ2016-80913-P and CTQ2017-89217-P)
Junta de Castilla y León (projects VA051P17 and VA062G18)
Xunta de Galicia (Consolidación GRC ED431C2017/61 from DXPCTSUG; ED-431G/02-FEDER “Unha maneira de facer Europa” to CINBIO, a Galician research center 2016−2019)
Junta de Castilla y León (projects VA051P17 and VA062G18)
Xunta de Galicia (Consolidación GRC ED431C2017/61 from DXPCTSUG; ED-431G/02-FEDER “Unha maneira de facer Europa” to CINBIO, a Galician research center 2016−2019)
Version del Editor
Propietario de los Derechos
© 2020 American Chemical Society
Idioma
spa
Tipo de versión
info:eu-repo/semantics/acceptedVersion
Derechos
openAccess
Aparece en las colecciones
Ficheros en el ítem
La licencia del ítem se describe como Attribution-NonCommercial-NoDerivatives 4.0 Internacional