

Author: Tokaryk D. W. van Wijngaarden J. A.
Publisher: NRC Research Press
ISSN: 1208-6045
Source: Canadian Journal of Physics, Vol.87, Iss.5, 2009-05, pp. : 443-448
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
Rotationally-resolved vibrational spectra of three bands related to the lowest frequency vibration of the five-membered heterocycle pyrrole (c-C4H4NH) have been recorded using infrared light from the Canadian Light Source synchrotron as the source. The N-H out-of-plane wagging fundamental band ν16 (474.6cm–1) was recorded with 0.001cm–1 resolution along with the first hot band 2ν16–ν16 (488.1cm–1). Both are governed by c-type selection rules. The first overtone 2ν16 (962.7cm–1) was recorded with 0.0013cm–1 resolution and has a-type rotational structure. A total of 9103 lines were assigned and included in a simultaneous fit of all three bands. The band origins and excited state rotational parameters were well-determined using Watson’s
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