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

Soshnikov, Igor E.; Semikolenova, Nina V.; Bushmelev, Alexey N.; Bryliakov, Konstantin P.; Lyakin, Oleg Y.; Redshaw, Carl; Zakharov, Vladimir A.; Talsi, Evgenii P.

doi:10.1021/om900490b.s001

om900490b_si_001.pdf (70.41 kB)

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

journal contribution

posted on 2009-10-26, 00:00 authored by Igor E. Soshnikov, Nina V. Semikolenova, Alexey N. Bushmelev, Konstantin P. Bryliakov, Oleg Y. Lyakin, Carl Redshaw, Vladimir A. Zakharov, Evgenii P. Talsi

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.