Electronic Influence of the Thienyl Sulfur Atom on the Oligomerization of Ethylene by Cobalt(II) 6-(Thienyl)-2-(imino)pyridine Catalysis (Articolo in rivista)

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  • Electronic Influence of the Thienyl Sulfur Atom on the Oligomerization of Ethylene by Cobalt(II) 6-(Thienyl)-2-(imino)pyridine Catalysis (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/om0609665 (literal)
Alternative label
  • C. Bianchini; D. Gatteschi; G. Giambastiani; I. Guerrero Rios; A. Ienco; F. Laschi; C. Mealli; A. Meli; L. Sorace; A. Toti; F. Vizza (2007)
    Electronic Influence of the Thienyl Sulfur Atom on the Oligomerization of Ethylene by Cobalt(II) 6-(Thienyl)-2-(imino)pyridine Catalysis
    in Organometallics (Online); ACS, American chemical society, Washington, DC (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • C. Bianchini; D. Gatteschi; G. Giambastiani; I. Guerrero Rios; A. Ienco; F. Laschi; C. Mealli; A. Meli; L. Sorace; A. Toti; F. Vizza (literal)
Pagina inizio
  • 726 (literal)
Pagina fine
  • 739 (literal)
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  • http://pubs.acs.org/doi/abs/10.1021/om0609665 (literal)
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  • 26 (literal)
Rivista
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  • 14 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • Institute of Chemistry of OrganoMetallic Compounds, ICCOM-CNR, Via Madonna del Piano, 10, 50019 - Sesto F.no., Firenze, Italia Dipartimento di Chimica, Uni ersita ` di Siena, Via Aldo Moro, 53100 Siena, Italy Dipartimento di Chimica and UdR INSTM, Uni ersita ` di Firenze, Via della Lastruccia 3, 50019 - Sesto F.no, Firenze, Italia (literal)
Titolo
  • Electronic Influence of the Thienyl Sulfur Atom on the Oligomerization of Ethylene by Cobalt(II) 6-(Thienyl)-2-(imino)pyridine Catalysis (literal)
Abstract
  • The position of the sulfur atom in the thienyl group of 6-(thienyl)-2-(imino)pyridine ligands strongly affects the catalytic activity of the corresponding tetrahedral high-spin dihalide CoII complexes in the oligomerization of ethylene to -olefins upon activation with methylaluminoxane (MAO). Complexes with the sulfur atom in the 3-position of the thienyl ring catalyze the selective conversion of ethylene to 1-butene, while catalysts containing thien-2-yl groups give C4 C14 alfa-olefins. In situ EPR experiments showed the occurrence of a spin state changeover with the formation of low-spin CoII species upon activation of the catalyst precursors by MAO. DFT calculations suggest that only thien-2-yl rings allow for the coordination of the sulfur atom to the cobalt center in the MAO-activated systems. (literal)
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