https://doi.org/10.1351/goldbook.R05290
Molecular distortion in linear molecular species with degenerate electronic states (e.g. belonging to the \(C_{\infty\text{v}}\) group). The Renner–Teller effect is a particular case of the @J03361@. From the point of view of the potential energy surfaces the Renner–Teller effect generates a surface touching (see scheme below).
Notes:
- The Renner–Teller effect arises from splittings in the vibrational levels of molecular entities due to even terms in the vibronic perturbation expansion. This is generally a minor effect for non-linear molecular entities compared to the @J03361@, which is due to the odd terms.
- For linear molecular entities it is the only possible vibronic effect characteristic of degenerate electronic states. R05290.png