Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/208618
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Dinuclear phosphine-amido [Rh2(diene){μ-NH(CH2)3PPh2}2] complexes as efficient catalyst precursors for phenylacetylene polymerization |
Autor: | Angoy, Marta CSIC; Jiménez, M. Victoria CSIC ORCID ; García-Orduña, Pilar CSIC ORCID; Oro, Luis A. CSIC ORCID; Vispe, Eugenio CSIC ORCID; Pérez-Torrente, Jesús J. CSIC ORCID | Fecha de publicación: | 13-may-2019 | Editor: | American Chemical Society | Citación: | Organometallics 38(9): 1991-2006 (2019) | Resumen: | Dinuclear phosphine-amido, [Rh(diene){μ-NH(CH)PPh}], and cationic phosphine-amino complexes, [Rh(diene){PhP(CH)NHR}] (diene = cod, nbd, tfb) and [Rh{PhP(CH)NHR}], have been prepared from the corresponding amino-functionalized phosphines PhP(CH)NHR (R = H, Me) and suitable rhodium(I) precursors. The dinuclear [Rh(diene){μ-NH(CH)PPh}] complexes bearing π-acceptors diene ligands such as nbd or tfb exhibit a remarkable catalytic activity in phenylacetylene (PA) polymerization affording stereoregular polyphenylacetylenes with, unlike the cod precursor, unimodal molar mass distributions of very high molecular weights, M up to ≈ 1.2 × 10, and moderate polydispersity indexes. These complexes are more active than the mononuclear phosphino-anilido [Rh(diene){PhP(CH)NMe}] complexes, which are in turn more active than the cationic complexes [Rh(diene){PhP(CH)NHMe}], [Rh(nbd){PhP(CH)NH}], and [Rh(nbd){PhP(CH)NHMe}] bearing the same diene ligand. In contrast, complexes [Rh{PhP(CH)NHR}] (R = H, Me) without a diene ligand have been found to be inactive in PA polymerization. The excellent catalytic performance of [Rh(diene){μ-NH(CH)PPh}] (diene = nbd, tfb) complexes is a consequence of the mode of activation of PA that likely results in the formation of unsaturated alkynyl species [Rh(diene)(CC-Ph)L] (L = PA, THF), which may be competent for PA polymerization. | Versión del editor: | http://doi.org/10.1021/acs.organomet.9b00078 | URI: | http://hdl.handle.net/10261/208618 | DOI: | 10.1021/acs.organomet.9b00078 | Identificadores: | doi: 10.1021/acs.organomet.9b00078 e-issn: 1520-6041 issn: 0276-7333 |
Aparece en las colecciones: | (ISQCH) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Amido_polym_Organometallics-2019-38-1991.pdf | 1,6 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
12
checked on 17-mar-2024
WEB OF SCIENCETM
Citations
11
checked on 27-feb-2024
Page view(s)
147
checked on 19-mar-2024
Download(s)
41
checked on 19-mar-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.