High-Resolution Infrared Spectroscopy of the ν4Fundamental Band of Chlorine Nitrate

✍ Scribed by Songlin Xu; Thomas A. Blake; Steven W. Sharpe

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 560 KB
• Volume: 175
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1996.0036

✦ Synopsis

Diode laser spectra of jet-cooled chlorine nitrate have been recorded in the 780 cm 01 spectral region corresponding to the n 4 fundamental. Jet rotational temperatures of about 7 K have allowed us to resolve the rotational structure of the band and perform an unambiguous spectral assignment for both the 35 ClONO 2 and 37 ClONO 2 isotopomers. Spectroscopic constants for the n 4 band were determined by fitting the observed transitions to an A-reduction Watson Hamiltonian in the I r representation. Results of a fit for 35 ClONO 2 are (in cm 01 ) n 0 Å 780.21626(4), A Å 0.403977(6), B Å 0.092525(2), C Å 0.075136(1), d J Å 0.42(21) 1 10 08 , D J Å 0.23(2) 1 10 07 , D K Å 0.16(2) 1 10 05 , and results of a fit for 37 ClONO 2 are n 0 Å 778.86960(6), A Å 0.40388(1), B Å 0.089969(1), C Å 0.073447(1), D J Å 0.16(4) 1 10 07 , D JK Å 0.18(7) 1 10 06 , D K Å 0.8(3) 1 10 06 . In addition, it was determined from a-and b-type transitions that the ratio of the vibrational dipole moment components is Ém vib a É/Ém vib b É Å 2.25(5).