Infrared Spectrum of the ν6 and ν7 Bands of Deuterated Nitric Acid (DNO3)

✍ Scribed by A.G. Maki; T.L. Tan; E.C. Looi; K.T. Lua; J.W.C. Johns; M. Noel

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 274 KB
• Volume: 157
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1993.1020

✦ Synopsis

The high-resolution Fourier transform infrared spectrum of the (\nu_{6}) and (\nu_{7}) bands of deuterated nitric acid ( (\mathrm{DNO}{3}) ) has been measured in the region between 510 and (667 \mathrm{~cm}^{-1}). The rovibrational transitions of both bands have been assigned and analyzed. Slightly improved ground state constants have been determined. The (\nu{7}) band is centered at (541.5847 \pm 0.0002 \mathrm{~cm}^{-1}). It shows no sign of perturbations and has been fit through (J=64) with an rms deviation of (0.0002 \mathrm{~cm}^{-1}). The (\nu_{6}) band is centered at (642.1383 \pm 0.0002 \mathrm{~cm}^{-1}) and is perturbed by (2 v_{9}) through a Fermi resonance term and possibly a Coriolis term. The resonance is particularly noticeable above (J=40), where a crossing of rotational levels of the two vibrational states leads to a (\Delta K \pm 2) interaction. A hot band centered at (632.7081 \pm 0.0005 \mathrm{~cm}^{-1}) has also been analyzed and identified as due to (\left(\nu_{6}+\right.) (\left.v_{9}\right)-v_{9}). c: 1993 Academic Press. Inc.