Title:
Exploring the Reactivity of Na[W2(μ-Cl)3Cl4(THF)2]∙(THF)3 towards the Polymerization of Selected Cycloolefins
Languages of Item:
English
Abstract:
The bimetallic compound Na[W2(µ-Cl)3Cl4(THF)2] (THF)3 (1, {W 3 W}6+ , a'2 e'4 ) is a highly efficient room-temperature initiator for ring opening metathesis polymerization (ROMP) of norbornene (NBE) and some of its derivatives. In most cases, addition of phenylacetylene (PA) as co-initiator improves the catalytic activity and retains the high cis-stereoselectivity. On the other hand, 1 can polymerize cyclopentadiene (CPD), not via a metathetic, but rather, via a cationic mechanism. Here, we present a comparison of the reactivity of the two catalytic systems (1 and 1/PA) between themselves and with other systems reported in the literature, the characterization of the polymers formed and mechanistic aspects of the corresponding reactions.
Authors:
Nikolaos Saragas
Georgios Floros
Grigorios Raptopoulos
Marinos Pitsikalis
Patrina Paraskevopoulou
Konstantinos Mertis
Journal:
Molecules: A Journal of Synthetic Organic Chemistry and Natural Product Chemistry
Keywords:
metathesis, ROMP, metal-metal bonds, tungsten
Main subject category:
Science
Official URL (Publisher):
Project information:
This research has been co-financed by the European Union (European Social Fund (ESF)) and Greek national funds through the Operational Program “Education and Lifelong Learning” of the National Strategic Reference Framework (NSRF)—Research Funding Program: THALES. Investing in knowledge society through the European Social Fund. MIS 377252.
