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Acyclic diene metathesis (ADMET) depolymerization: Ethenolysis of 1,4-polybutadiene using a ruthenium complex

✍ Scribed by M. D. Watson; K. B. Wagener

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
106 KB
Volume
37
Category
Article
ISSN
0887-624X

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✦ Synopsis

␣,-Vinyl-terminated butadiene oligomers can be generated through the cross-metathesis of ethylene and high molecular weight 1,4-polybutadiene catalyzed by the complex RuCl 2 (ACHPh)(PCy 3 ) 2 . The effect of varied ethylene pressure is studied in order to obtain the highest conversion to the monomer 1,5-hexadiene. A dramatic increase in yield of this monomeric diene is realized relative to previous published attempts utilizing a well-defined group VI metal alkylidene in the same chemistry. Traces of side products are observed, and alternate mechanisms for their formation were proposed.

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✍ Krystyna Brzezinska; Patrick S. Wolfe; Mark D. Watson; Kenneth B. Wagener 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 422 KB

## Abstract A series of α,ω‐dienes have been exposed to Ru(Cl~2~)(CHPh)(PCy~3~)~2~, [Ru] 3, metathesis catalyst under acyclic diene metathesis (ADMET) conditions, and the products were compared with those obtained previously using Schrock's well defined Mo and W alkylidenes. High molecular weight