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Nature of the Active Sites in Soluble Ziegler-Polymerization Catalysts Generated from Titanocene Halides and Organoaluminum Lewis Acids

  • J. J. Eisch
  • M. P. Boleslawski
  • A. M. Piotrowski
Conference paper

Abstract

That the active site in Ziegler-Natta polymerization catalysts is the transition metal-carbon bond receives strong support from the finding that pure transition metal alkyls, such as tetrabenzyltitanium [1], can themselves polymerize ethylene and propylene, even in the complete absence of any main-group alkyl. However, it is also evident that combinations of transition-metal salts or organometallics with main-group alkyls often display greatly enhanced catalytic activity and stereoregular polymerization in such processes [2]. The isotactic polymerization of propylene by TiCl3 and Et2AlCl [3] and the greatly accelerated polymerization of ethylene by Cp2ZrMe2 and (MeAlO)n [4] are cases in point.

Keywords

Ethylene Polymerization Polymerization Catalyst Titanocene Dichloride Insertion Product Allylation Product 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • J. J. Eisch
    • 1
  • M. P. Boleslawski
    • 1
  • A. M. Piotrowski
    • 1
  1. 1.Department of ChemistryState University of New York at BinghamtonBinghamtonUSA

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