Process for the isomerization of metallocene compounds

摘要

An isomerization process comprising the step of contacting a slurry or a solution comprising the meso or meso-like form of one or more bridged metallocene compounds of group 4 of the Periodic Table of the Elements having C₂ or C₂-like symmetry with an isomerization catalyst of formula (I) [R₄W]⁺X^- (I) wherein: W is a nitrogen or a phosphorus atom; R, equal to or different from each other, are C₁-C₄₀ hydrocarbon radicals and X^- is an halide atom.