Abstract Under mild conditions, the copper (I) complex [Cu I (TMPA) CH 3 CN] PF 6 (TMPA= tris (2-pyridyl-methyl) amine), reacts stoichiometrically with benzyl and allyl halides, and α- halo-ketones to produce near quantitative yields of carbon-carbon reductively coupled products bibenzyls, diolefins or diketones, respectively. The copper complex acts as the halide acceptor and the copper (II) complex [Cu II (TMPA) X] PF 6 (X Cl− or Br−) is also ...