Polyfluoroacetone complexes of transition metals

Abstract

Hexafluoroacetone reacts with the zero-valent compounds [Ph₃P]₄M (M = Pt or Pd) to afford the complexes [Ph₃P]₂M[(CF₃)₂CO]. The compounds [Ph₃P]₂Pt[(CF₂Cl)₂CO] and [Ph₂PMe]₂Pt[(CF₃)₂CO] have been similarly prepared. Related iridium(III) complexes are also described, as are stable iridium(III) derivatives with 1,1-dicyano-2,2-bis(trifluoromethyl)ethylene, hexafluoropropene, and bromotrifluoroethylene as ligands. The infrared and ¹⁹F n.m.r. spectra of these complexes suggest the presence of three-membered ring systems involving the metal atom.