the dynamic properties in allylpalladiumcomplexes containing hemilabile ligands. These rearrangements have the potential of altering stereochemistry, which can ultimately affect the stereochemistry and regiochemistry of reactions upon the allyl group, e.g., allylic alkylation. Apparentrotation of an η3-allyl in four-coordinate PdII-complexes can be the result of ligand exchange or intramolecular