Ligand effects in the non-alternating CO-ethylene copolymerization by palladium(II) catalysis (Articolo in rivista)

Type
Label
  • Ligand effects in the non-alternating CO-ethylene copolymerization by palladium(II) catalysis (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/b711280g (literal)
Alternative label
  • Bettucci L.; Bianchini C.; Claver C.; Garcia Suarez E. J.; Ruiz A.; Meli A.; Oberhauser W. (2007)
    Ligand effects in the non-alternating CO-ethylene copolymerization by palladium(II) catalysis
    in Dalton transactions (2003. Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Bettucci L.; Bianchini C.; Claver C.; Garcia Suarez E. J.; Ruiz A.; Meli A.; Oberhauser W. (literal)
Pagina inizio
  • 5590 (literal)
Pagina fine
  • 5602 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Chimica deiComposti Organometallici (ICCOM-CNR),Area di RicercaCNRdi Firenze, viaMadonna delPiano 10, 50019, Sesto Fiorentino, Italy. Dept. de Quimica Fisica i Inorganica, Facultat de Quimica, Universitat Rovira i Virgili, c/Marcel.li Domingo s/n, 43007, Tarragona, Spain. (literal)
Titolo
  • Ligand effects in the non-alternating CO-ethylene copolymerization by palladium(II) catalysis (literal)
Abstract
  • In this paper we report on a comparative study of the non-alternating CO-C2H4 copolymerization catalyzed by neutral PdII complexes with the phosphine-sulfonate ligands bis(o-methoxyphenyl)- phosphinophenylenesulfonate and bis(o-methoxyphenyl)phosphino-ethylenesulfonate. The former ligand, featuring a lower skeletal flexibility, has been found to form more active catalysts as well as produce polyketones with higher molecular weight and higher extra-ethylene incorporation. Operando high-pressure NMR studies have allowed us to intercept, for the first time, PdII(phosphine-sulfonate) b-chelates in the non-alternating copolymerization cycle, while model organometallic reactions have contributed to demonstrate that PdII (phosphine-sulfonate) fragments do not form stable carbonyl complexes. The opening of the b-chelates has been found to be a viable process by either comonomer, which contrasts with the behaviour of PdII (chelating diphosphine) catalysts for the perfectly alternating copolymerization (literal)
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