15min:

M. ROTGER, V. BOUDON, M. LOETE, N. ZVEREVA-LOETE, Laboratoire de Physique de l'Université de Bourgogne, CNRS UMR 5027, 9, Avenue Alain Savary, BP 47870, F-21078 Dijon Cedex, France.

The techniques of symmetry-adapted tensorial formalism and of vibrational extrapolation developed since many years by the Dijon group have proved their efficiency for the spectroscopy of spherical-top molecules (CH₄, SF₆, ...). We have extended these methods to the case of quasi-spherical tops such as SO₂F₂. This model has been used recently to perform the analysis of the ground state of this molecule. We present here a preliminary study concerning the analysis of the ₃/ ₇/ ₉ bending triad in the 550 cm^-1 region. These results are compared to those obtained with the usual asymmetric-top approach . A set of programs for spectrum calculations and fits named C_2vTDS has been used and is freely available at the URL:

\centerline\tt http://www.u-bourgogne.fr/LPUB/c2vTDS.html