| Abstract
| - The reaction of (E)-1,3-diphenyl-3-acetoxyprop-1-ene, PhCHCH−CH(Ph)-OAc, withpalladium(0) complexes Pd0L2, generated from Pd0(PPh3)4 or Pd0(dba)2 + 2L (L = PPh3 orL2 = dppb), gives cationic [(η3-PhCH-CH-CHPh)PdL2]+ complexes with AcO- as thecounteranion in DMF. It is established that this reaction proceeds through two successiveequilibria via neutral intermediate complexes (η2-PhCHCH-CH(Ph)-OAc)Pd0L2, characterized from the kinetics and by UV and 31P NMR spectroscopy. The rate constants andequilibrium constants of the successive steps have been determined in DMF. They dependon the ligand and the Pd0 precursor. In all cases, for the concentration range investigatedhere, the complexation is considerably faster than the ionization, which is the rate-determining step of the overall process. Under similar experimental conditions, the formationof the cationic complex [(η3-PhCH-CH-CHPh)Pd(dppb)]+ is considerably slower than theformation of the complex [(η3-CH2-CH-CH2)Pd(dppb)]+ in DMF.
- The equilibrium and rate constants of the reaction of PhCHCH-CH(Ph)-OAc with Pd0 complexes have been determined in DMF.
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