Vibrational overtone spectroscopy of three-membered rings.
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.
Hsieh
Shizuka
S
Chemistry Department, Smith College, Clark Science Center, Northampton, MA 01063, USA. shsieh@email.smith.edu
Miller
Benjamin J
BJ
Södergren
A Helena
AH
Kjaergaard
Henrik G
HG