Active intermediates in ethylene polymerization over titanium bis(phenoxyimine) catalysts

Konstantin P. Bryliakov, Evgenii A. Kravtsov, Dale A. Pennington, Simon J. Lancaster, Manfred Bochmann, Hans H. Brintzinger, Evgenii P. Talsi

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69 Citations (Scopus)


Reactive intermediates in living olefin polymerization over homogeneous catalysts based on bis[N-(3-tert-butylsalicylidene)-2,3,4,5,6-pentafluoroanilinato]titanium(IV) dichloride (L2TiCl2) have been studied. Outer sphere ion pairs [L2TiMe(S)]+[Me-MAO]- and [L2TiMe(S)]+[B(C6F5)4]- (S = solvent molecule), formed by activation of L2TiCl2 with MAO or with AlMe3/[CPh3]+[B(C6F5)4]-, and reactions of these ion pairs with ethene to afford chain-propagating species [L2TiP]+[Me-MAO]- and [L2TiP]+[B(C6F5)4]- (P = growing polymeryl chain) have been characterized by 1H, 13C, and 19F NMR spectroscopy.
Original languageEnglish
Pages (from-to)5660-5664
Number of pages5
Issue number23
Publication statusPublished - 2005

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