Facing Unexpected Reactivity Paths with ZrIV-Pyridylamido Polymerization Catalysts (Articolo in rivista)

Type
Label
  • Facing Unexpected Reactivity Paths with ZrIV-Pyridylamido Polymerization Catalysts (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/chem.201102194 (literal)
Alternative label
  • Luconi L; Rossin A.; Tuci G.; Tritto I.; Boggioni L.; Klosin J.J.; Theriault C.N.; Giambastiani G. (2012)
    Facing Unexpected Reactivity Paths with ZrIV-Pyridylamido Polymerization Catalysts
    in Chemistry (Weinh., Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Luconi L; Rossin A.; Tuci G.; Tritto I.; Boggioni L.; Klosin J.J.; Theriault C.N.; Giambastiani G. (literal)
Pagina inizio
  • 671 (literal)
Pagina fine
  • 687 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://onlinelibrary.wiley.com/doi/10.1002/chem.201102194/abstract;jsessionid=A2B64B621AD5496AD50FA559A1A76968.d03t01?systemMessage=Wiley+Online+Library+will+be+disrupted+on+27+October+from+10%3A00-12%3A00+BST+%2805%3A00-07%3A00+EDT%29+for+essential+maintenance (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 18 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Luconi L.; Rossin, A.; Tuci, G.; Giambastiani, G.: ICCOM CNR, Inst Chem OrganoMetall Cpds, I-50019 Florence, Italy Tritto I.: ISMAC CNR, Inst Macromol Studies, I-20133 Milan, Italy Boggioni L.: ISMAC CNR, Inst Macromol Studies, I-20133 Milan, Italy Klosin, J.J.; Theriault, C.N.: Dow Chem Co USA, Corp R&D, Midland, MI 48674 USA (literal)
Titolo
  • Facing Unexpected Reactivity Paths with ZrIV-Pyridylamido Polymerization Catalysts (literal)
Abstract
  • This work provides original insights to the better understanding of the complex structure-activity relationship of ZrIV-pyridylamido-based olefin polymerization catalysts and highlights the importance of the metal-precursor choice (Zr(NMe2)4 vs. Zr(Bn)4) to prepare precatalysts of unambiguous identity. A temperature-controlled and reversible ?-bond metathesis/protonolysis reaction is found to take place on the ZrIV-amido complexes in the 298-383 K temperature range, changing the metal coordination sphere dramatically (from a five-coordinated tris-amido species stabilized by bidentate monoanionic {N,N-} ligands to a six-coordinated bis-amido-mono-amino complexes featured by tridentate dianionic {N-,N,C-} ligands). Well-defined neutral ZrIV-pyridylamido complexes have been prepared from Zr(Bn)4 as metal source. Their cationic derivatives [ZrIV{N-,N,C-}Bn]+[B(C6F5)4]- have been successfully applied to the room-temperature polymerization of 1-hexene with productivities up to one order of magnitude higher than those reported for the related HfIV state-of-the-art systems. Most importantly, a linear increase of the poly(1-hexene) Mn values (30-250 kg mol-1) has been observed upon catalyst aging. According to that, the major active species (responsible for the increased Mn polymer values) in the aged catalyst solution, has been identified. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
Insieme di parole chiave di
data.CNR.it