An electron paramagnetic resonance study of nitrogen dioxide dissolved in water, carbon tetrachloride and some organic compounds

Electron paramagnetic resonance spectrometry was used to characterize and measure the concentration of nitrogen dioxide dissolved in water, carbon tetrachloride, n-hexane, acetone and benzene at 290 K. Solutions were monitored by ultraviolet spectrometry. We measured the equilibrium constant for N2O4 plus NO2 dissolved in n-hexane and carbon tetrachloride. In order to investigate the formation of organic nitroxide type intermediates, some experiments were designed to examine the role of NO and NO plus NO2 mixtures.