Molecular distortion in linear molecular species with degenerate electronic states
(e.g., belonging to the
group).
The Renner–Teller effect is a particular case of the
Jahn–Teller effect. 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 Jahn–Teller effect, which is due to the odd terms.
-
For linear molecular entities it is the only possible vibronic effect characteristic
of degenerate electronic states.
Source:
PAC, 2007, 79, 293
(Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006))
on page 414
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
https://doi.org/10.1351/goldbook.
