Cationic Rare-Earth-Metal Half-Sandwich Complexes for the Living trans-1,4-Isoprene Polymerization

Rare, but well done! Fluorinated borates [Ph3C][B(C6F5)4] and [PhNMe2H][B(C6F5)4] and the borane reagent B(C6F5)3 activate rare‐earth‐metal bis(tetramethylaluminate) complexes in a distinct and efficient manner (an activated catalyst is shown in the picture) for the fabrication of synthetic gutta‐pe...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2008-01, Vol.47 (4), p.775-778
Main Authors: Zimmermann, Melanie, Törnroos, Karl W, Anwander, Reiner
Format: Article
Language:English
Subjects:
aluminum
Boranes - chemistry
Borates - chemistry
Butadienes - chemistry
Catalysis
cations
Cations - chemistry
Crystallography, X-Ray
Hemiterpenes - chemical synthesis
Hemiterpenes - chemistry
isoprene
lanthanides
Latex - chemical synthesis
Latex - chemistry
Ligands
Metals, Rare Earth - chemistry
Models, Molecular
Molecular Conformation
Organometallic Compounds - chemical synthesis
Organometallic Compounds - chemistry
Pentanes - chemistry
polymerization
Stereoisomerism
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Summary:Rare, but well done! Fluorinated borates [Ph3C][B(C6F5)4] and [PhNMe2H][B(C6F5)4] and the borane reagent B(C6F5)3 activate rare‐earth‐metal bis(tetramethylaluminate) complexes in a distinct and efficient manner (an activated catalyst is shown in the picture) for the fabrication of synthetic gutta‐percha (99.5 % trans‐1,4‐polyisoprene, Mn=0.8–4.4×105 g mol−1, Mn/Mw=1.18).
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200703514