15min:

CHEOLHWA KANG, ZHENG SU AND YUNJIE XU, Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2 Canada.

Propylene oxide is a simple chiral building block and is a prototype for theoretical and experimental studies of chiral recognition effects. The low resolution infrared vibrational spectra in the C-H stretching region of propylene oxide in the gas phase and in a free jet expansion were reported previously. In this talk, we will present the first high resolution infrared spectra of four C-H stretching vibrational modes. The spectra have been measured using a rapid scan mid-infrared lead salt diode laser spectrometer equipped with an astigmatic multi-path sample cell. Analyses of the observed spectra show that there are severe perturbations associated with the first vibrationally excited states. The detailed analyses will be discussed.