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Keywords:

  • gold;
  • homogeneous catalysis;
  • palladium;
  • reaction mechanisms;
  • transmetalation
Thumbnail image of graphical abstract

It's the second step that counts: Arylation of Pd by Au takes place through transition states and intermediates featuring strong Au⋅⋅⋅Pd metallophilic interactions (see picture). However, the aryl transfer from [AuArL] to [PdArClL2] is thermodynamically disfavored and will not occur unless an irreversible Ar[BOND]Ar coupling from [PdAr2L2] follows.