Overtone spectrum and the Fermi resonance of the SiH chromophore in SiHCl3

Yun Ding, Sheng Gui He, Jing Jing Zheng, Shui Ming Hu, Xiang Huai Wang, Qing Shi Zhu

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Abstract

The Fourier transform and Fourier transform intracavity laser absorption spectra of the gas phase SiHCl3 molecule were recorded from 1000 cm-1 up to 13 000 cm-1. The normal mode analysis is carried out to fit the observed band centres. The reduced Hamiltonian models in terms of normal and curvilinear internal coordinates are used to study the Fermi resonance between the SiH stretching and bending modes and analyse the observed band centres associated with the SiH chromophore. The resonance in the SiH chromophore is found not to be important due to the cancellation of the contributions from the kinetic and the potential coupling terms. Off-diagonal anharmonic constants between the SiH stretching and bending manifold and the molecular frame have been determined. The SiH chromophore vibrational intensities are also reported.

Original languageEnglish (US)
Pages (from-to)1669-1678
Number of pages10
JournalMolecular Physics
Volume99
Issue number19
DOIs
StatePublished - Oct 10 2001

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    Ding, Y., He, S. G., Zheng, J. J., Hu, S. M., Wang, X. H., & Zhu, Q. S. (2001). Overtone spectrum and the Fermi resonance of the SiH chromophore in SiHCl3. Molecular Physics, 99(19), 1669-1678. https://doi.org/10.1080/00268970110063926