Cationic Yttrium Methyl Complexes as Functional Models for Polymerization Catalysts of 1,3-Dienes
✍ Scribed by Stefan Arndt; Klaus Beckerle; Peter M. Zeimentz; Thomas P. Spaniol; Jun Okuda
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 246 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0044-8249
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
Activation with AlMe at low temperature converts half-metallocene complexes of tantalum with methyl methacrylate (MMA) and diazadiene ligands such as [Cp\*Ta(η -Cy-DAD)(η -MMA)] (structure shown) into effective catalysts for the polymerization of MMA. Polymerization is complete after 10 min at -20°C
## Abstract Amino‐alkoxy‐bis(phenolate) yttrium complexes act in the presence of an excess of alcohol (up to 50 equiv. vs. Y) as highly active and stereoselective catalysts for __rac__‐lactide and __rac__‐__β__‐butyrolactone polymerizations. These versatile systems enable the production of large qu