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The 2ν8 Band of CH3CN

✍ Scribed by M. Koivusaari; A.M. Tolonen; R. Paso; J. Schroderus; R. Anttila

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
364 KB
Volume
160
Category
Article
ISSN
0022-2852

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✦ Synopsis

The overtone band (2 \nu_{8}^{0}) of (\mathrm{CH}{3} \mathrm{CN}) around (720 \mathrm{~cm}^{-1}) has been measured on a Bruker Fourier transform spectrometer at a resolution of (0.003 \mathrm{~cm}^{-1}). Only the parallel band was observed, but due to the (l(2,2)) resonance, (\Delta K=-2) lines leading to the (v{8}=2, l_{8}=-2) levels with (K=1-3) could be seen. More information for the (l_{8}= \pm 2) component of the vibrational state (v_{8}=2) was evaluated from the hot band (2 \nu_{8}^{\frac{{ }{8}^{2}}{}}-\nu{8}^{+1}). Altogether more than 1000 lines were assigned. In the fit pure rotational lines from literature were also combined. Among the results the anomalous (A_{0}) - (A^{\prime}) values (4.6722(13) \times 10^{-3} \mathrm{~cm}^{-1}) for the (2 \nu_{8}^{0}) band and (7.0324(32) \times 10^{-3} \mathrm{~cm}^{-1}) for the (2 \nu_{8}^{ \pm 2}) band are striking. (c) 1993 Academic Press. Inc.

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