Fourier Transform Infrared Emission Spectroscopy of SeH

✍ Scribed by R.S. Ram; P.F. Bernath

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 129 KB
• Volume: 203
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2000.8147

✦ Synopsis

The infrared vibration-rotation bands of SeH have been measured in the X 2 ⌸ ground state using a Fourier transform spectrometer. The bands were observed in a microwave discharge of a mixture of H 2 and Se in the presence of He. The rotational structure of the 1-0, 2-1, 3-2 bands of the X 2 ⌸ 3/ 2 spin component and the 1-0 band of X 2 ⌸ 1/ 2 spin component has been observed in the 1800 -2600 cm Ϫ1 region. The principal ground state molecular constants obtained are e ϭ 2421.7153(234) cm Ϫ1 , e x e ϭ 44.6012(110) cm Ϫ1 , e y e ϭ 0.20697(236) cm Ϫ1 , B e ϭ 7.899187(696) cm Ϫ1 , ␣ e ϭ 0.220749(399) cm Ϫ1 , and r e ϭ 1.464319(64) Å. This work is the first determination of the equilibrium molecular constants of the X 2 ⌸ state of SeH.