Investigating the Nature of the Active Species in Bis(imino)pyridine Cobalt Ethylene Polymerization Catalysts

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• 作者：Igor E. Soshnikov ; Nina V. Semikolenova ; Alexey N. Bushmelev ; Konstantin P. Bryliakov ; Oleg Y. Lyakin ; Carl Redshaw ; Vladimir A. Zakharov ; Evgenii P. Talsi
• 刊名：Organometallics
• 出版年：2009
• 出版时间：October 26, 2009
• 年：2009
• 卷：28
• 期：20
• 页码：6003-6013
• 全文大小：1029K
• 年卷期：v.28,no.20(October 26, 2009)
• ISSN：1520-6041

文摘

The activation of bis(imino)pyridine cobalt-based catalysts of ethylene polymerization with methylalumoxane (MAO), AlMe₃, and AlMe₃/[CPh₃][B(C₆F₅)₄] has been studied by ¹H, ²H, and ¹⁹F NMR and EPR spectroscopy. The nature of the active sites of polymerization is discussed. The polymerization kinetics and the polymer properties for the different catalyst/activator systems were correlated with spectroscopic data.