The Fundamental Bands in the Infrared Spectrum of Stibine (SbH3)

✍ Scribed by L Fusina; G Di Lonardo

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 162 KB
• Volume: 216
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2002.8673

✦ Synopsis

The infrared spectrum of stibine, SbH 3 , has been recorded in the regions between 720 and 1000 cm -1 and between 1750 and 2020 cm -1 at a resolution of about 0.004 cm -1 . Rovibrational transitions belonging to the ν 2 , ν 4 bending and ν 1 , ν 3 stretching fundamental bands have been measured and assigned for both 121 Sb and 123 Sb isotopomers. Strong perturbations due to rovibrational interactions have been observed both in the bending and in the stretching bands. Splittings of the K = 3, 6, and 9 lines have been observed and perturbation-allowed transitions with selection rules (k -) = ±3, ±6, and ±9 have been also identified. Simultaneous analyses of transitions belonging to the ν 2 /ν 4 or ν 1 /ν 3 dyads have been performed. The central frequencies of the hyperfine structures of the rotational transitions in the v 2 = 1 and v 4 = 1 states, recorded in the microwave region by Fourier transform spectroscopy [H. Harder, C. Gerke, and L. Fusina, J. Chem. Phys. 114, 3508-3523 (2001)], have been included in the data set. The theoretical model adopted explicitly takes into account the Coriolis interactions between the v 1 = 1 (A 1 ) and v 3 = 1 (E) and between the v 2 = 1 (A 1 ) and v 4 = 1 (E) states, including also several essential resonances within them.