ETHANE SIMMETRIC STRECHING VIBRATIONAL NORMAL MODES
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Publisher:Ohio State University
Ethane is reported as a non-rigid molecule taking as variable the $\theta$ methyl internal rotational angle. In this work the symmetric C-H stretching and the C-C stretching normal modes of vibration will be considered as function of the internal rotational angle. The potential function is expressed as a Taylor expansion in terms of the normal modes, and the expansion variables are evaluated at different $\theta$ angle and finally they are expressed and fitted to a $\theta$ function. It is quite important to emphasize the symmetry of the normal modes of vibration and the non-rigid group before writing a properly simetrized potential function.
Author Institution: Departamento de Quimica, Universidad Autonoma Metropolitana; Departamento de Astrofisica Molecular e Infrarroja, Instituto de Estructura de la Materia, C.S.I.C.; Departamento de Quimica, Universidad Autonoma Metropolitana, Av. San Rafael Atlixco, Col. Vicentina