@article{2818758,
    title = "Exploring the Reactivity of Na[W2(μ-Cl)3Cl4(THF)2]∙(THF)3 towards the Polymerization of Selected Cycloolefins",
    author = "Nikolaos Saragas and Georgios Floros and Grigorios Raptopoulos and Marinos Pitsikalis and Patrina Paraskevopoulou and Konstantinos Mertis",
    journal = "Molecules: A Journal of Synthetic Organic Chemistry and Natural Product Chemistry",
    year = "2015",
    volume = "20",
    number = "12",
    pages = "21896-21908",
    publisher = "MDPI",
    issn = "1420-3049",
    keywords = "metathesis, ROMP, metal-metal bonds, tungsten",
    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."
}