Stability of palladium(II)–olefin complexes in glacial acetic acid

Abstract

Investigation of the species formed when terminal olefins are added to a solution obtained by dissolving Na₂[PdCl₄] in glacial acetic acid has shown that only two olefin complexes. Na[Pd₂Cl₅(olefin)] and [Pd₂Cl₄(olefin)₂], can be detected. The stability constants K₁and K₂ for the equilibria (i) and (ii) are essentially independent of chain length in the range C₅–C₉. Na₂[Pd₂Cl₆]+ olefin [graphic omitted] Na[Pd₂Cl₅(olefin)]+ NaCl (i), Na[Pd₂Cl₅(olefin)]+ olefin [graphic omitted] Pd₂Cl₄(olefin)₂+ NaCl (ii)