Abstract
A ruthenium based benzylidene complex bearing an O, N-bidentate Schiff base ligand exhibits poor olefin metathesis activity but generates a highly active catalyst system when treated with acidic cocatalysts. Various Lewis acids were able to boost the ring opening metathesis polymerization (ROMP) of cycloocta-1,5-diene (COD). The best results were obtained with trichlorosilane (HSiCl 3), which was also found to improve metathesis activity of the Grubbs second generation catalyst [RuCl 2( CHPh)(H 2IMes)(PCy 3)] in the ROMP of COD and the ring closing metathesis (RCM) of diethyl diallylmalonate.
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