Abstract
AbstractThe same Morse potential predicts the vibrational overtone spectra for the various isotopomers of HCl. However, the C‐H stretching overtones of HCN require different Morse parameters for different isotopomers. This paper considers how the other vibrational coordinates change the frequency of the C‐H overtones. A simple model is used that considers the C‐H to be a Morse oscillator and the other motions to be harmonic oscillators. The change in bending frequency with overtone level and kinetic coupling between the two stretching motions accounts for the observed C‐H overtone spectrum. The simple Morse potential that accounts for a single isotopomer is only an effective potential.
Published Version
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