Mono- and bi-nuclear anionic pentafluorophenyl complexes of palladium(II) and platinum(II)

Abstract

The arylation of K₂[MCl₄], [MCl₂(tht)₂], MCl₂, or [NBu₄]₂[M₂(µ-Br)₂Br₄](M = Pd or Pt; tht = tetrahydrothiophen) with LiR or MgBrR (R = C₆F₅) leads to novel mono- and bi-nuclear anionic organo-derivatives of the general formulae [MR₃(tht)]^–, [MR₄]^2–, and [M₂(µ-Br)₂R₄]^2–, which have been isolated as tetra-alkylammonium salts. Reaction of compounds of the [MR₃(tht)]^– type with neutral ligands leads to the substitution of tht by L, that of [PdR₄]^2– with PdCl₂ gives rise to the formation of [Pd₂(µ-Cl)₂R₄]^2–, whilst [M₂(µ-X)₂R₄]^2– reacts with alkali-metal salts of Br^–, I^–, or SCN^– to give (without cleavage of the bridging system) the corresponding complexes. Twenty anionic complexes of these three novel types have been isolated and characterized.