Remarkable Rate Enhancement in CO Insertion into Pd-C Bond by Generating Cationic Organopalladium Complexes [PdR(s)L2]+BF4− (R = Alkyl Group, s = Acetone, L = Phosphine Ligands) from Neutral Monoorganopalladium Complexes [PdR(X)L2] (X = Halide)
Removal of the halide ligand X in PdR(X)L2 with AgBF4 generates solvent-coordinated cationic organopalladium complexes [PdR(s)L2]BF4 which show much higher reactivities for CO insertion than the parent neutral complexes.