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Overtone Spectra and Intensities of Tetrahedral Molecules in Boson-Realization Models

✍ Scribed by Xi-Wen Hou; Mi Xie; Shi-Hai Dong; Zhong-Qi Ma

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
200 KB
Volume
263
Category
Article
ISSN
0003-4916

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✦ Synopsis

The stretching and bending vibrational spectrum and the intensities of infrared transitions in a tetrahedral molecule are studied in two boson-realization models, where the interactions between stretching and bending vibrations are described by a quadratic cross term and by Fermi resonance terms, called harmonically coupled and Fermi resonance boson-realization model, respectively. The later is a development of our recent model. As an example, the two models are applied to the overtone spectrum and the intensities of silicon tetrafluorde. Those models provide fits to the published experimental vibrational eigenvalues with standard deviations 1.956 cm &1 and 0.908 cm &1 , respectively. The intensities of infrared transitions of its complete vibrations are calculated in the two models, and results show a good agreement with the observed data.

πŸ“œ SIMILAR VOLUMES

Unitary Approach to Vibrational Spectra
Unitary Approach to Vibrational Spectra of Tetrahedral Molecules: Generalized Infrared Intensity Model
✍ C. Leroy; V. Boujut πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 English βš– 286 KB

In this paper we further extend a previous formalism, the construction of a dipole function adapted to tetrahedral molecules. The extension is based on an algebraic construction of symmetrized tensor operators through unitary algebra and point group symmetry. We prove that this generalization allows