New catalyst systems and their application for metathesis reactions

摘要

A new catalyst system comprising a metathesis catalyst and one or more salts of mono-, di- and/or tri-valent cations other than copper. A new catalyst system comprising a metathesis catalyst and one or more salts of formula K n+> A z-> (I), in which K : a cation other than copper; A : an anion; n, z : 1, 2 or 3 .