<i>Cis</i>-Specific Polymerization of Norbornene Catalyzed by Tungsten Based Complex Catalysts Bearing an O–N–O Tridentate Ligand

  • Yuushou Nakayama
    Department of Macromolecular Science, Graduate School of Science, Osaka UniversityToyonaka, Osaka
  • Naoko Ikushima
    Department of Macromolecular Science, Graduate School of Science, Osaka UniversityToyonaka, Osaka
  • Akira Nakamura
    Department of Macromolecular Science, Graduate School of Science, Osaka UniversityToyonaka, Osaka

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Abstract

<jats:title>Abstract</jats:title> <jats:p>Tungsten complexes bearing O–N–O tridentate ligands, WOCl2{(OCR12CH2)(OCR22CH2)(NC5H3)} (3: R1 = Ph, R2 = Me; 4: R1 = R2 = Me) were synthesized. The complex 3 was revealed to have octahedral structure with two oxygen atoms of alkoxide in trans position by X-ray analysis. These complexes catalyze the polymerization of norbornene upon activation with Et3Al and the catalyst system 3/2Et3Al yielded polynorbornenes with high cis content.</jats:p>

Journal

  • Chemistry Letters

    Chemistry Letters 26 (9), 861-862, 1997-09-01

    Oxford University Press (OUP)

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