Disproportionation of Nitric Oxide at High Pressure

Article abstract of DOI:10.1021/j100255a026

A facile pressure-induced disproportionation of nitric oxide occurs at 176 K and 1.5 GPa.The reaction products are N2O4, N2O, and a small, variable amount of N2O3 as identified by infrared, Raman, and visible absorption spectroscopies.No free NO, N2O2, or NO2 is observed after warming the sample to room temperature.The N2O4 product subsequently photolyzes to form N2O3 and NO2⁺NO3^-, and evidence for the nitrite form of N2O4 is reported.The N2O product is stable, once formed, to 14.0 GPa.