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On the oxidation state of the tungsten atom in WCl6-based metathesis catalysts used for the ring-opening polymerization of cycloolefins

✍ Scribed by E. Ceausescu; A. Cornilescu; E. Nicolescu; M. Popescu; S. Coca; M. Cuzmici; C. Oprescu; M. Dimonie; M. Teodorescu; G.H. Hubca; V. Dragutan; M. Chipara; R. Grosescu; A. Vasilescu


Publisher
Elsevier Science
Year
1988
Weight
572 KB
Volume
46
Category
Article
ISSN
0304-5102

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✍ Yuushou Nakayama; Masaya Tanimoto; Takeshi Shiono πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons 🌐 English βš– 128 KB

## Abstract A series of pentavalent tantalum and niobium complexes with aryloxy ligands was prepared, and their catalytic behavior for the ROMP of norbornene was studied in the presence of an alkylaluminum cocatalyst. Tantalum complexes **1**–**4** showed very high activity for the ROMP of NBE in c