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Torsional Splittings in the Band ν9+ ν4− ν4of Ethane

✍ Scribed by J. Susskind; L. Iredell; W.E. Blass; D.C. Reuter; G.W. Halsey; D.E. Jennings

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
467 KB
Volume
192
Category
Article
ISSN
0022-2852

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✦ Synopsis

Torsional splittings of the C 2 H 6 hot band 9 ϩ 4 Ϫ 4 have been determined based on measurements taken with the Kitt Peak National Observatory Fourier transform spectrometer with .0025 cm Ϫ1 resolution. The measured splittings range from Ϫ.2347 cm Ϫ1 (the sign is relative to that of the observed splitting in the 9 band of C 2 H 6 ) to .0682 cm Ϫ1 , with a standard deviation of the observed splittings of .0251 cm Ϫ1 . The splittings can be explained as a result of xy Coriolis interaction of 9 ϩ 4 with the excited torsional states 4 , with the major effect arising from the "forbidden" interaction with the nearly degenerate state 5 4 ϭ 2. The rms error of the predicted splittings is .00422 cm Ϫ1 , if parameters determined from theory and previous work are used, and is .00217 cm Ϫ1 , if small refinements to the parameters are made based on the measured splittings themselves.

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