Kinetics of complex formation between palladium(II) acetate and bis(diphenylphosphino)ferrocene

The kinetics of complex formation between palladium(II) acetate, and 1,1’-bis(diphenylphosphino)ferrocene, dppf, in two different deuterated solvents CDCl₃ and DMSO-d₆ were investigated using ³¹P NMR spectroscopy. The mole ratio and the ³¹P-chemical shifts in DMSO-d₆ solution revealed the formation of an intermediate, which is gradually converted into the more stable Pd(dppf)OAc)₂] species with a dppf acting as a chelate ligand. In the chloroform solution however, the interaction of metal ion and the ligand resulted directly in the formation of Pd(dppf)OAc)₂] species with a chelating dppf. The rate constant for the complexation reaction was evaluated from computer fitting of the corresponding integration-time data.