Vibrational overtone spectroscopy of three-membered rings |
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Authors: | Hsieh Shizuka Miller Benjamin J Södergren A Helena Kjaergaard Henrik G |
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Institution: | Chemistry Department, Smith College, Clark Science Center, Northampton, MA 01063, USA. shsieh@email.smith.edu |
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Abstract: | We have recorded vapor-phase photoacoustic spectra of cyclopropane, ethylene oxide, and ethylene sulfide in the third, fourth, and fifth CH-stretching overtone regions. We have used a harmonically coupled anharmonic oscillator local mode model to facilitate analysis of the spectra. Fermi resonance between the CH-stretching and HCH-bending vibrations is essential to explain the observed wide and multistructured CH-stretching overtone bands. A number of weak combination bands can account for the remaining experimental features observed to the blue of the CH-stretching regions. We have reassigned the fundamental spectra of these three-membered rings. |
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