New ring-opening metathesis polymerization catalyst based on five-coordinate tungsten(VI) alkylidene complex containing an ortho-chelating arylamine ligand : X-ray structure of [W{C6H4(CH2NMe2)-2}(=NPh)(=CHSiMe3)(CH2SiMe3)]

Autor: Koten, G. van, Schaaf, P.A. van der, Smeets, W.J.J., Spek, A.L.
Jazyk: angličtina
Rok vydání: 1992
Předmět:
Zdroj: Journal of the Chemical Society : Chemical Communications, 1(9), 717. Chemical Society
ISSN: 0022-4936
Popis: At –78°C [W(NPh)(CH2SiMe3)3Cl] reacts with 2-[(dimethylamino)methyl]phenyllithium in diethyl ether to produce a tetra-organotungsten(VI) complex which decomposes by an H-elimination reaction generating a novel tungsten(VI) alkylidene with intramolecular coordination of an amine function; this complex reacts with norbornene to provide a cis-polymer that is the result of a selective ring-opening metathesis.
Databáze: OpenAIRE