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High-Resolution Infrared Spectroscopy of the ν4 + ν8 − ν8 Band of CH3NC

✍ Scribed by C. He; J. Pliva; L. Le; L.P. Gold; R.A. Bernheim

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
305 KB
Volume
159
Category
Article
ISSN
0022-2852

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✦ Synopsis

The vibration-rotation spectrum of the (\nu_{4}+\nu_{8}-\nu_{8}) band for (\mathrm{CH}{3} \mathrm{NC}) has been observed and measured with an interferometric spectrometer with a spectral resolution of (0.004 \mathrm{~cm}^{-1} ; 175) transitions were assigned to the (P(J, k, l)) branches spanning (J=5-29) and (k=3-8). Spectroscopic constants for the (\nu{4}+\nu_{8}) state were obtained through a least-squares fit by explicitly taking account of the 1 -resonance. The validity of the additivity rule of molecular constants is discussed. Small anomalies detected in the (K=3) and 4 subbands of the (\nu_{4}+\nu_{8}-v_{8}) band were ascribed to a rotational resonance ((\Delta /=\mp 1, \Delta k= \pm 2)) between the (\nu_{4}+\nu_{8}) and (4 \nu_{8}^{-2}) states. (c) 1993 Acadcmic Press, Inc.

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