INFRARED ABSORPTION OF CIS-CIS PEROXYNITROUS ACID (HOONO) IN SOLID ARGON
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Date
1994
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Publisher
Ohio State University
Abstract
Nitric acid $(HONO_{2})$ isolated in solid argon at 12 K was irradiated with 193-nm emission from an ArF excimer laser. Recombination of photofragments OH and $NO_{2}$ led to the formation of various conformers of peroxynitrous acid (HOONO). In addition to the previously reported lines due to cisperp $HOONO,^{1}$ lines at 3285.4, 1600.3, 1395.0, 927.2, 794.3, and $616.9 cm^{-1}$ were observed; they are assigned to cis-cis HOONO. The observed vibrational frequencies and the $^{I5}N$ isotopic shifts of both conformers are in agreement with recent theoretical calculations. The cis-cis HOONO was photolysed much more rapidly than the cis-perp HOONO upon irradiation of the 308-nm emission from the XeC1 laser. The mechanism of formation of different conformers of HOONO are discussed.
Description
$^{1}$ B M. Cheng, J-W. Lee and Y.-P. Lee, J. Phys Chem. 95, 2814 (1991).
Author Institution: Department of Chemistry, National Tsing Hua University
Author Institution: Department of Chemistry, National Tsing Hua University