Abstract
We have recently proposed a symmetry adapted local mode model to describe vibrational excitations in polyatomic molecules. The model was initially restricted to the description of non-linear (and non-planar) polyatomic molecules. In this work we extend the symmetry-adapted algebraic approach to include linear molecules. In the harmonic limit the model reduces to the standard spectroscopic methods for molecular vibrations. Results for the triatomic molecules HCN and CO 2 are reported.
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