The role of two-component catalysts containing chelating bisaryloxide ligands in controlling the stereochemistry of the metathesis polymerization of norbornene

Denise L. Barnes, Nancy W. Eilerts, Joseph A. Heppert, Wayne H. Huang, Martha D Morton

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The ring-opening metathesis polymerization of norbornene and 5,5-dimethylnorbornene has been studied with a range of tungsten(VI) ring-opening metathesis polymerization procatalysts containing chelating diolate ligands, including catechols, 1,8-dihydroxynaphthalene, 1,1′-bi-2-naphthol, biphenanthrol and bis(2-hydroxyphenyl) methane. One class of these catalysts, W(X)(OArO)Cl2(THF) (X = O or NArMe2) was produced via alcoholysis reactions between W(X)Cl4 and the respective diol. Polymers of norbornene produced with these catalysts showed a reasonable correlation between ring size and cis-selectivity. This effect is most likely steric in origin. Analyses of the tacticity of poly-5,5-dimethylnorbornene showed a correlation betwen high cis-olefin content and syndiotacticity, even when produced with catalysts containing asymmetric chelating diolate ligands.

Original languageEnglish (US)
Pages (from-to)1267-1275
Number of pages9
JournalPolyhedron
Volume13
Issue number8
DOIs
StatePublished - Jan 1 1994

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Stereochemistry
metathesis
stereochemistry
Chelation
Polymerization
polymerization
Ligands
Ring opening polymerization
Catechols
catalysts
ligands
Catalysts
Tungsten
rings
Alkenes
Naphthol
Polymers
alkenes
Olefins
tungsten

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

The role of two-component catalysts containing chelating bisaryloxide ligands in controlling the stereochemistry of the metathesis polymerization of norbornene. / Barnes, Denise L.; Eilerts, Nancy W.; Heppert, Joseph A.; Huang, Wayne H.; Morton, Martha D.

In: Polyhedron, Vol. 13, No. 8, 01.01.1994, p. 1267-1275.

Research output: Contribution to journalArticle

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