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Spectroscopic investigation of the Ã [sup 1]A[sup ʺ]-X̃ [sup 1]A[sup ʹ] electronic transition of HSiNCO

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journal contribution
posted on 29.09.2009, 13:52 by Matthew Richard Dover, Corey J. Evans, Colin M. Western
The first spectroscopic observation of the previously unknown species HSiNCO has been reported. HSiNCO was generated by the fragmentation of trimethylsilylisocyanate with a high-voltage discharge source. The 0[sup 0, sub 0] band of the Ã [sup 1]A[sup ʺ]-X̃ [sup 1]A[sup ʹ] transition has been recorded with full rotational resolution using laser-induced fluorescence spectroscopy and ground and excited state rotational and centrifugal distortion constants determined. Ten additional vibrational bands belonging to HSiNCO have also been observed in the laser-induced fluorescence spectrum and have been assigned based on predicted anharmonic vibrational frequencies. Due to the large change in geometry upon excitation, a number of axis-rotation peaks have been observed in the 0 [sup 0, sub 0] band and the axis-rotation angle (θ [sub T]) has been estimated to be 0.6°±0.2°. Dispersed fluorescence spectroscopy has been carried out and ν[sub 8] (the N–C–O out-of-plane bending mode) and a number of overtones of ν[sub 4] (the Si–H wagging mode) have been observed in the ground electronic state.

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Citation

Journal of Chemical Physics, 2009, 131 (12), 4302.

Published in

Journal of Chemical Physics

Publisher

American Institute of Physics

issn

0021-9606

Copyright date

2009

Available date

29/09/2009

Publisher version

http://scitation.aip.org/content/aip/journal/jcp/131/12/10.1063/1.3224128

Language

en

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