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Bond length dependence on quantum states as shown by spectroscopy

Lim, Kieran 2005, Bond length dependence on quantum states as shown by spectroscopy, Journal of chemical education, vol. 82, no. 1, pp. 145-149.

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Title Bond length dependence on quantum states as shown by spectroscopy
Author(s) Lim, KieranORCID iD for Lim, Kieran
Journal name Journal of chemical education
Volume number 82
Issue number 1
Start page 145
End page 149
Publisher Division of Chemical Education, American Chemical Society
Place of publication Bellmawr, N.J.
Publication date 2005-01
ISSN 0021-9584
Summary Undergraduate students often have the misconception that molecules have fixed, unchanging bond lengths. This article discusses how linear-molecule rotational band spacings in infrared spectroscopy can be used as a qualitative, visual demonstration of the elongation of average bond lengths on vibrational excitation. The method does not depend on a detailed mathematical analysis of the spectra. In UV–vis spectroscopy, the rotational band spacings give rise to distinctive linear-molecule rotational contours, which easily show whether the average bond length has increased or decreased. The method is based on a spreadsheet simulation of the vibration–rotation or rovibronic (electronic–vibration–rotation) spectrum and is applied to hydrogen chloride IR, iodine UV–vis, and nitrogen UV–vis spectra in this article.
Language eng
Field of Research 030606 Structural Chemistry and Spectroscopy
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2005, Division of Chemical Education, American Chemical Society
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