Abstract
The mechanisms of interaction between the deformations of the two moieties of ethane-like molecules in degenerate vibrational modes are investigated by simple methods of classical mechanics. Special attention is given to γ-Coriolis interaction in degenerate vibrational states, which generates first order vibration-torsion coupling.
It is shown that the level splitting due to tunneling through the torsional barrier in degenerate vibrational states is strongly affected by the value of the Coriolis ξ coefficient. Simple classical considerations can explain the recent experimental result that all degenerate normal modes of ethane form E1d, E2d paired representations of the G36(EM) molecular symmetry group.
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Dedicated to Professor István Kovács on his eightieth birthday
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di Lauro, C., Lattanzi, F. & Avellino, R. A classical insight of the γ-Coriolis coupling in ethane-like molecules. Acta Physica Hungarica 74, 307–317 (1994). https://doi.org/10.1007/BF03156403
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DOI: https://doi.org/10.1007/BF03156403