Infrared absorption spectra of nitrogen oxides in liquid xenon. Isomerization of N2O3 a)

Infrared absorption spectra of nitrogen oxides present when NO and NO2 are dissolved in liquid xenon between 160 and 220 K have been measured. Spectral absorptions of NO, NO2, (NO)2, N2O4, and N2O3 are identified, and integrated absorption cross sections are given for several spectral features. The spectra suggest that symmetric N2O3 and asymmetric N2O3 are in equilibrium in solution and that the energy difference between these two isomers is 1.8±0.2 kcal/mol.