Controlled Ring-Opening Metathesis Polymerization by Molybdenum and Tungsten Alkylidene Complexes

Abstract

A new, convenient preparation of tungsten (CHtBu)(NAr)Cl2(dme) (Ar = 2,6-diisopropylphenyl) involves treatment of W(NAr)(OtBu)2(CH2tBu)2 with PCl5 in dimethoxyethane as a final step. From it a variety of complexes of the type W(CHtBu)(NAr)(or)2 (R = alkyl or fluoroalkyl) can be prepared straightforwardly in high yield. Analogous complexes of the type Mo(CHtBu)(NAr)(OR)2 also have been prepared. Complexes in which OR =OtBu will not react with ordinary olefins, but will react with strained cyclic olefins such as norbornene and cyclopentene to give living polymers from which the organic polymer can be cleaved by treatment with aldehydes. Reprints.

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Document Details

Document Type
Technical Report
Publication Date
Jul 29, 1988
Accession Number
ADA198073

Entities

People

  • Dominic C. Yang
  • Jerald Feldman
  • John S. Murdzek
  • Konrad Knoll
  • Richard S. Schrock
  • Steven A. Krouse

Organizations

  • Massachusetts Institute of Technology

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Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Alkenes
  • Alkynes
  • Block Copolymers
  • Chemistry
  • Column Chromatography
  • Engineering
  • Equations
  • Low Temperature
  • Materials
  • Materials Science
  • Military Research
  • Molecular Weight
  • New York
  • Organic Chemistry
  • Polymers
  • United States

Fields of Study

  • Chemistry

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  • Organic Chemistry