Ziegler-Natta catalyst activation. Thermodynamic and kinetic aspects of metallocenium ion-pair formation, dissociation, and structural reorganization

Lubin Luo, Tobin J Marks

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

This contribution reviews thermochemical and dynamic NMR studies of metallocenium olefin polymerization catalyst formation from, and dissociation to, the neutral metallocene dimethyl precursors and either fluoroarylboranes or methylalumoxane (MAO), as well as the kinetics of ion pair separation/recombination/reorganization. Significant correlations are found between borane Lewis acidity, the enthalpy of catalyst formation, catalyst NMR spectral parameters, the free energy of activation of catalyst ion pair separation/recombination/reorganization, and ethylene polymerization activity.

Original languageEnglish
Pages (from-to)97-106
Number of pages10
JournalTopics in Catalysis
Volume7
Issue number1-4
Publication statusPublished - 1999

Fingerprint

Ziegler catalyst
Chemical activation
Thermodynamics
activation
dissociation
Ions
catalysts
thermodynamics
Catalysts
Kinetics
kinetics
ions
polymerization
Polymerization
Nuclear magnetic resonance
Boranes
nuclear magnetic resonance
boranes
Alkenes
Acidity

Keywords

  • Borane
  • Ion pair separation
  • MAO
  • Metallocene
  • Olefin polymerization
  • Structural dynamics
  • Thermochemistry

ASJC Scopus subject areas

  • Catalysis
  • Chemistry (miscellaneous)
  • Physical and Theoretical Chemistry

Cite this

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