Key intermediates in metallocene-and post-metallocene-catalyzed polymerization

E. P. Talsi, K. P. Bryliakov, N. V. Semikolenova, V. A. Zakharov, M. Bochmann

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15 Citations (Scopus)

Abstract

The structures of intermediates formed upon the activation by methylaluminoxane (MAO) of a wide range of metallocene and post-metallocene catalysts of olefin polymerization were studied by C-13, H-1, and F-19 NMR. For all metallocenes considered (L2ZrCl2 and L2TiCl2), under conditions similar to real polymerization conditions (Al/Zr > 200), two types of intermediates were identified in the reaction solution, namely, heterodinuclear ion pairs [L-2 M(mu-Me)(2)AlMe2](+)[Me-MAO](-) (III) and zwitterionic intermediates L-2 MMe+
Original languageEnglish
Pages (from-to)490-504
Number of pages15
JournalKinetics and Catalysis
Volume48
Issue number4
DOIs
Publication statusPublished - Jul 2007

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