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.
Bibliographical noteFunding Information:
This work was partially supported by the National Project for the Development of Key Fundamental Sciences in China, by the National Natural Science Foundation of China, by the Foundation of Ministry of Education of China, and by the Foundation of the Chinese Academy of Science.
Copyright 2008 Elsevier B.V., All rights reserved.