15min:

T. ZAPOROZAN AND J. A. VAN WIJNGAARDEN, Department of Chemistry, University of Manitoba, Winnipeg, MB, Canada R3T 2N2.

High quality infared spectra of the two lowest frequency modes of azetidine (c-C₃H₆NH) have been recorded between 100 and 700 cm^-1 using the far infrared beamline at the Candian Light Source in Saskatoon. The far infrared endstation couples highly spatially confined synchrotron light into a Bruker IFS125HR Fourier transform spectrometer and can achieve spectral resolution up to 0.000959 cm^-1. The observed modes correspond to the ring puckering mode ( ₁₆) at 207.2 cm^-1 and the N-H bending mode ( ₁₅) at 648.2 cm^-1. Rotational analysis of the ring puckering mode confirmed our ab initio prediction that the band structure is governed by a-type selection rules rather than c-type transitions as reported for oxetane. The results of the rovibrational analysis of both bands will be presented and comparisons will be made between the synchrotron spectra and those collected using a conventional globar source.