Analysis of Some Perturbations in the ν4 Band of Methyl Chloride
- 1 March 1968
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 48 (5), 2163-2167
- https://doi.org/10.1063/1.1669407
Abstract
The ν 4 band of CH3Cl has been analyzed in detail. It is found that there is a weak, but important, vibrational resonance between ν 4 1 and 3ν 6 1 . The resonance is quantitatively taken into account in order to determine the unperturbed rotational constants for both ν 4 1 and 3ν 6 1 . Both chlorine isotopes are resolved and treated separately. The interaction parameter is found to be given by 3.519( ± 0.006) + 0.028kl( ± 0.003) cm − 1 where the uncertainties are 3 times the computed standard errors. The k ‐dependent term is evidently due to a z ‐axis Coriolis‐like interaction which is also possible between ν 4 1 (E) and 3ν 6 1 (E) .Keywords
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