TY - JOUR
TI - Exploring the Reactivity of Na[W2(μ-Cl)3Cl4(THF)2]∙(THF)3 towards the Polymerization of Selected Cycloolefins
AU - Nikolaos Saragas
AU - Georgios Floros
AU - Grigorios Raptopoulos
AU - Marinos Pitsikalis
AU - Patrina Paraskevopoulou
AU - Konstantinos Mertis
JO - Molecules: A Journal of Synthetic Organic Chemistry and Natural Product Chemistry
PY - 2015
VL - 20
TODO - 12
SP - 21896-21908
PB - MDPI
SN - 1420-3049
TODO - null
TODO - metathesis, ROMP, metal-metal bonds, tungsten
TODO - 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.
ER -