Infrared band intensities of ethylene oxide

Abstract

The infrared absorption intensities of ethylene oxide and ethylene oxide‐d 4 were measured in the gas phase using the pressure broadening method. When a band is overlapped by other bands, it is separated by the simulation calculation. The obtained band intensities were analyzed by the least squares method with the aid of the results from the Coriolis analyses and the CNDO/2 calculations. The correct sign combination of (∂p/∂Q i ) has been sucessfully determined. The atomic polar tensors and the local intensity parameters of the CH2 group were calculated. The CH2 local intensity parameters of ethylene oxide were found almost equal to those of cyclopropane, and different from those of C–CH2–C and CH2 = C systems.