Fluxional behavior and polymerization activity of the new alfa,alfa'-ortho-xylene-bis-(5,6-dimethyl-1-indenyl)-zirconium dichloride (Articolo in rivista)

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Label
  • Fluxional behavior and polymerization activity of the new alfa,alfa'-ortho-xylene-bis-(5,6-dimethyl-1-indenyl)-zirconium dichloride (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1002/1521-3935(200207)203:10/11<1301::AID-MACP1301>3.0.CO;2-# (literal)
Alternative label
  • Santi, R.; Abis, L.; Sommazzi, A.; Zannoni, C.; Proto, A.; Ricci, G.; Millini, R.; Masi, F. (2002)
    Fluxional behavior and polymerization activity of the new alfa,alfa'-ortho-xylene-bis-(5,6-dimethyl-1-indenyl)-zirconium dichloride
    in Macromolecular chemistry and physics (Print); WILEY-V C H VERLAG GMBH,, D-69451 WEINHEIM, (Germania)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Santi, R.; Abis, L.; Sommazzi, A.; Zannoni, C.; Proto, A.; Ricci, G.; Millini, R.; Masi, F. (literal)
Pagina inizio
  • 1301 (literal)
Pagina fine
  • 1308 (literal)
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  • 203 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
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  • 10-11 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ENI-Versalis; CNR-ISMAC Istituo per lo Studio delle Macromolecole (literal)
Titolo
  • Fluxional behavior and polymerization activity of the new alfa,alfa'-ortho-xylene-bis-(5,6-dimethyl-1-indenyl)-zirconium dichloride (literal)
Abstract
  • We synthesize a new ortho-xylenyl-bridged substituted metallocene catalyst which surprisingly affords ethylene-1-hexene copolymers with broad molecular weight distribution (MWD), when activated with methylaluminoxane (MAO). In order to investigate the reasons of this behavior we carry out an in-depth study on the metallocene complex. Its structure is determined by X-ray crystallography and found to have C-1 symmetry in the solid state. Variable temperature H-1 NMR suggests the existence in solution of a show conformational exchange between two identical C-1 structures. Therefore, the broad MWD has been ascribed to the presence of two conformationally blocked, ogle-site catalysts (literal)
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