Cleavage of [Pd(PP)(-Cl)][BArF] (PP = Bis(phosphino)ferrocene, BArF = Tetrakis(3,5-bis(trifluoromethyl)phenyl)borate) with Monodentate Phosphines.

The addition of Na[BArF] (BArF = tetrakis(3,5-bis(trifluoromethyl)phenyl)borate) to [Pd(PP)Cl] (PP = 1,1'-bis(phosphino)ferrocene ligands) compounds results in the loss of a chloride ligand and the formation of the dimeric species [Pd(PP)(-Cl)][BArF]. In most cases, the addition of a monodentate phosphine, PR, to these dimeric species leads to cleaving of the dimer and formation of [Pd(PP)(PR)Cl][BArF]. While these reactions are readily observed via a significant color change, the P{H} NMR spectra offer more significant support, as the singlet for the dimer is replaced with three doublets of doublets.