Abstract

Dimethylbis(diethylphenylphosphine)palladium(II) complex was found to undergo a facile trans- cis isomerization reaction in tetrahydrofuran containing methylmagnesium compounds such as Me 2Mg and MeMgBr. Kinetic and isotopic studies on the isomerization process suggest the occurrence of methylmagnesium-catalyzed isomerization through an intermolecular methyl exchange process between methylpalladium and methylmagnesium compounds involving a partial dissociation of phosphine ligand.

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