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The ν1and ν2Bands of FNO2

✍ Scribed by Charles E. Miller; Stanley P. Sander

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 183 KB
Volume: 184
Category: Article
ISSN: 0022-2852
DOI: 10.1006/jmsp.1997.7347

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✦ Synopsis

High-resolution infrared spectra of the strong a-type absorptions corresponding to the n 1 (n 0 Ç 1310.75 cm 01 ) and n 2 (n 0 Å 821.9387 cm 01 ) bands of FNO 2 have been analyzed. The n 1 line positions exhibited extensive perturbations as a result of three nearly degenerate vibrational states-n 1 , n 3 / n 6 , and n 5 / n 6 -which interact through strong Coriolis coupling. The weak Coriolis interaction between n 2 and n 6 reported by Tanaka and Morino (1969, J. Mol. Spectrosc. 32, 436-448) manifested itself through changes in the b-axis constants of the n 2 Å 1 state; nevertheless, over 1400 n 2 transitions were fit with an rms error of 0.00066 cm 01 using the standard A-reduced Hamiltonian. Line positions, assignments, and relative intensities for the dominant transitions in both bands have been established, although a comprehensive analysis of the perturbations requires a detailed understanding of the lower frequency vibrational states.

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