Vanadium(III)-Catalyzed Polymerization of α-Olefins: Detailed NMR Spectroscopic Characterization of Intermediates Modeling the Active Species of Polymerization

Igor E. Soshnikov, Nina V. Semikolenova, Konstantin P. Bryliakov, Vladimir A. Zakharov, Evgenii P. Talsi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The ion pairs formed upon the activation of bis(imino)pyridine complex LVCl3 (L=2,6-bis[1-(2,6-dimethylphenylimino)ethyl]pyridine) with AlMe2Cl and AlMe3/[Ph3C][B(C6F5)4] were characterized in detail by 1H and 2H NMR spectroscopy, including the first NMR observation of the VIII−CH3 group. The following ion pairs were identified: [L(Cl)VIII(μ-Cl)2AlMe2]+[A], [L(Me)VIII(μ-Cl)2AlMe2]+[A], [LVIIICl2(THF)]+[A], and [LVIII(Cl)Me(THF)]+[A] ([A]=[AlMe3Cl] or [B(C6F5)4], THF=tetrahydrofuran). The nature of the ethylene polymerization active species is discussed.

Original languageEnglish
Pages (from-to)1253-1260
Number of pages8
JournalChemCatChem
Volume9
Issue number7
DOIs
Publication statusPublished - 7 Apr 2017

Keywords

  • N ligands
  • NMR spectroscopy
  • polymerization
  • reaction mechanism
  • vanadium
  • ACTIVATION
  • EPR
  • VANADIUM COMPLEXES
  • IRON(II)
  • ETHYLENE POLYMERIZATION
  • H-1
  • LIGANDS
  • ZIEGLER-NATTA
  • CATALYTIC BEHAVIOR

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