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The High-Resolution Far-Infrared Torsional Spectrum of Ethane

✍ Scribed by N. Moazzen-Ahmadi; E. Kelly; J. Schroderus; V.-M. Horneman

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 101 KB
Volume: 209
Category: Article
ISSN: 0022-2852
DOI: 10.1006/jmsp.2001.8427

No coin nor oath required. For personal study only.

✦ Synopsis

The far-infrared spectrum of gaseous CH 3 CH 3 has been measured at a resolution of 0.0016 cm -1 using a Fourier transform spectrometer. The spectrum was recorded with an absorption pathlength of 172 m. The temperature and pressure of the sample were 294 K and 10 Torr, respectively. A total of 1072 lines in the torsional fundamental and the first torsional hot band were identified. The spectrum shows fully resolved torsion-rotation splittings. As a result, all the torsion-rotation parameters in the zeroth-and the first-order Hamiltonian were determined. We are therefore in a position to determine the torsion-rotation energy for the lowest three torsional states of ethane very accurately and to reliably predict the energy positions for the higher torsional states.

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