Self-immobilizing Precatalysts: Norbornene-Bridged Zirconium ansa-Metallocenes (Articolo in rivista)

Type
Label
  • Self-immobilizing Precatalysts: Norbornene-Bridged Zirconium ansa-Metallocenes (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/adsc.200800168 (literal)
Alternative label
  • Polo E.; Forlini F.; Bertolasi V.; Boccia A.C.; Sacchi M.C. (2008)
    Self-immobilizing Precatalysts: Norbornene-Bridged Zirconium ansa-Metallocenes
    in Advanced synthesis & catalysis (Print); WILEY-V C H VERLAG GMBH, WEINHEIM (Germania)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Polo E.; Forlini F.; Bertolasi V.; Boccia A.C.; Sacchi M.C. (literal)
Pagina inizio
  • 1544 (literal)
Pagina fine
  • 1556 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://onlinelibrary.wiley.com/doi/10.1002/adsc.200800168/pdf (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 350 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 10 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • E. Polo; ISOF CNR F. Forlini, A.C. Boccia, M.C. Sacchi; ISMAC CNR (literal)
Titolo
  • Self-immobilizing Precatalysts: Norbornene-Bridged Zirconium ansa-Metallocenes (literal)
Abstract
  • We report here the synthesis of new tethered biscyclopentadienyl and bisindenyl zirconocenes, bearing one unsaturation on the interannular bridge, and their use as self-immobilizing catalysts. They proved to be active catalysts towards ethylene polymerization in solution, with activities comparable to those displayed by commercial rac-Et(Ind)(2)ZrCl(2)- When tested as self-polymerization catalysts under suitable experimental conditions, they gave colored precipitates that, once reactivated with MAO, were significantly active in ethylene polymerization, although lower than those of the corresponding catalytic systems in solution. The molecular weights of the produced polymers were similar to those obtained with the same catalysts in solution, but their distribution resulted to be broader, with values typical of heterogeneous catalytic systems. From (13)C NMR studies we had the first spectroscopic evidence of the actual incorporation of a metallocene of this type into a polymeric chain. (literal)
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