The influence of Jahn-Teller interaction, vibronic coupling and spin-orbit splitting on the Hel excited photoelectron spectra of the boron trihalides

Hel excited photoelectron spectra of the boron trihalides have been recorded with improved resolution, and several new vibrational progressions have been observed in the spectra of BCl 3 , BBr 3 and BI 3 . The spectra illustrate, as would be expected, that spin-orbit coupling becomes important in th...

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Bibliographic Details
Published in:Molecular physics 1999-02, Vol.96 (3), p.323-333
Main Authors: SHPINKOVA, L. G., HOLLAND, D. M. P., SHAW, D. A.
Format: Article
Language:English
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Summary:Hel excited photoelectron spectra of the boron trihalides have been recorded with improved resolution, and several new vibrational progressions have been observed in the spectra of BCl 3 , BBr 3 and BI 3 . The spectra illustrate, as would be expected, that spin-orbit coupling becomes important in the heavier trihalides, and affects the photoelectron band structure strongly. Progressions involving excitation of the symmetric stretching vibrational mode are observed in all four molecules. Some of the new structure revealed in the photoelectron spectra of BCl 3 , BBr 3 and BI 3 is assigned, and the molecular orbital configurations in BBr 3 and BI 3 are discussed, taking into account existing theoretical predictions and the present experimental results.
ISSN:0026-8976
1362-3028
DOI:10.1080/00268979909482966