Regioselective C-F bond activation of hexafluoropropylene on palladium(0): formation of a cationic η(2) -perfluoroallylpalladium complex.

A chemoselective C(sp(2) )F or C(sp(3) )F bond activation of hexafluoropropylene (HFP) was achieved by adopting the proper combination of a Lewis acid co-additive with a ligand which coordinates Pd(0) . The treatment of [(η(2) -HFP)Pd(PCy3 )2 ] with B(C6 F5 )3 allowed a chemoselective C(sp(3) )F bond cleavage of HFP to give a unique cationic perfluoroallypalladium complex. In this complex, the coordination mode of the perfluoroallyl ligand was considered to be of the unique η(2) -fashion.