Vibrational spectroscopy of complex compounds of gold pentafluoride

IR and Raman spectra of X+AuF6- (X = ClF2, ClO2, ClOF2, ClF4, ClF6) were st udied. The vibration frequencies of these compounds in the solid phase and in solutions in anhydrous HF were assigned. Peculiar features of the vibrat ional spectra of solid X+AuF6- associated both with structural transformati ons of cations and anions in the crystal lattice field and cation-anion int eractions and also with the Jahn-Teller effect, Fermi resonance, non-rigid intramoleciular rearrangements., etc., were discussed.