ON THE STRUCTURE OF THE NU(1)(HF) BAND OF THE HCN ... HF COMPLEX

A new subseries of bands was observed on the previously reported serie s of peaks forming the structure of the nu1(HF) band of the HCN...HF c omplex. This is assigned to hot transitions from the excited states of the hydrogen bond stretching nu4 and hydrogen bond bending nu7 modes. The obtained spectra of HCN/HF/Xe mixtures with Xe density increasing up to 8.2 amagat suggest resonance interactions between the 2nu7 and nu4 and/or nu1 + 2nu7 and nu1 + nu4 vibrational levels of the HCN ... HF complex. The model calculations of the nu1 (HF) band were performed assuming the band is a superposition of vibrational rotational bands due to hot transitions from all low frequency hydrogen bond modes.