Reactions of W(CCMe3) (OCMe3)3 with terminal alkynes: metathesis and polymerization
作者:André Mortreux、Francis Petit、Michèle Petit、Teresa Szymanska-Buzar
DOI:10.1016/1381-1169(94)00004-2
日期:1995.2
Catalytic metathesis of terminal alkynes RC=CH (R = alkyl, phenyl) is performed with the carbyne complex WCCMe(3) (OCCMe(3))(3) 1. This reaction is rapidly masked by a polymerization reaction, which is the only process occurring at low temperature, The production of deprotiometallacyclic complexes WC(3)R(2)(OCCMe(3))(2) 2 by loss of tert-butyl alcohol from the metallacyclobutadiene intermediates is shown to be responsible for the deactivation in metathesis. Compounds of type 2 are extremely reactive in phenylacetylene polymerization.