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High-Resolution Infrared Laser Study of the ν4 Absorption Band of cis-CHClCHF

✍ Scribed by P. Stoppa; A. Pietropolli Charmet; S. Giorgianni; S. Ghersetti

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
113 KB
Volume
198
Category
Article
ISSN
0022-2852

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✦ Synopsis

cis-1-Chloro-2-fluoroethylene was synthesized, and the gas-phase infrared spectrum was investigated in the 4 band region between 1321-1350 cm Ϫ1 , at a resolution of about 0.002 cm Ϫ1 , employing a tunable diode-laser spectrometer. This vibration of symmetry species AЈ gives rise to an a/b-hybrid band, even though our analysis pointed out that the intensity of the a-type component is predominant. Most of the J and K structure was resolved in different subbranches, and the rovibrational analysis led to the assignment of about 1900 a-type lines with J Յ 71 and K a Յ 20 for the 35 Cl isotopic species. The 4 fundamental is locally perturbed by a weak Coriolis resonance and some local crossings were found; the 3 12 state seems to be the most likely interacting level. Using Watson's A-reduction Hamiltonian in the I r representation, a set of spectroscopic parameters for the v 4 ϭ 1 state was obtained.

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