Diastereoisomeric (η6-arene)ruthenium(II) chiral Schiff base complexes: crystal structure of a triphenylphosphine adduct

Abstract

Reaction of [(η⁶-p-cymene)RuCl(L*)] with AgClO⁴ in Me₂CO gives a perchlorate complex which on subsequent treatment with PPh₃, γ-picoline or Cl- yields adducts showing that there can be retention as well as inversion of configuration at the metal centre. The (R)_Ru,(S_C absolute configurations of the chiral centres in the triphenylphosphine adduct have been established by an X-ray diffraction study [HL*, (S-α-methylbenzylsalicylaldimine]. The CD spectral study reveals that there is an inversion of configuration during formation of the PPh₃ adduct.