Isotope Substitution in near Local Mode Molecules: Bending Overtones nnu2 (n = 2, 3) of the HDS Molecule.

There are two main goals in the present study: (a) to record and analyze the weak overtones nnu2 (n = 2, 3) of the bending fundamental nu2 of the HDS molecule and (b) to derive new isotopic relations for spectroscopic parameters applicable to predict, at least qualitatively, the structures of the excited bending states of HDX-type molecules. Copyright 1998 Academic Press.

High-Resolution Fourier Transform Spectra of HDS in the Regions of the Bands nu1 and 2nu1/nu2 + nu3

High-resolution spectrum of the HDS molecule was recorded with the Bruker Fourier spectrometer in Oulu in the regions of the nu1 and 2nu1/nu2 + nu3 absorption bands. Fine rotational structure of the nu1 band was analyzed with the model of an isolated vibrational state, while in the analysis of the 2nu1 and nu2 + nu3 bands it was necessary to take into account the resonance interactions between these two bands. Comparison of the experimentally determined parameters is made with the deductions of the expanded local mode approach. Copyright 1998 Academic Press.