Infrared diode laser spectroscopy of FCO: The ν1 and ν2 bands |
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Authors: | Keiichi Nagai Chikashi Yamada Yasuki Endo Eizi Hirota |
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Affiliation: | Institute for Molecular Science, Okazaki 444, Japan |
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Abstract: | The ν1 (CO stretching) and ν2 (CF stretching) bands of the FCO radical were observed with Doppler-limited resolution by an infrared diode laser spectrometer with Zeeman and source modulation. The FCO radical was generated by a 60-Hz discharge in one of the following three gas mixtures: O2 + C2F4, CO + SF6, and CO + C2F4, all diluted with He. The observed spectra were analyzed to determine the rotational constants, the centrifugal distortion constants, and the spin-rotation interaction constants. The band origins, 1861.6372(1) and 1026.1283(1) cm?1 [with standard errors in parentheses], which were obtained, were found to agree well with matrix data, 1857 and 1023 cm?1, respectively. The assignment of the observed spectra to the FCO radical was further supported by observing the ν1 band of F13CO, which was obtained from 13CO and SF6. The molecular structure and the force field of FCO are briefly discussed by using molecular constants obtained from the observed spectra. |
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