511. Vibrational spectra of ionic forms of oxides and oxy-acids of nitrogen. Part VI. Raman-spectral evidence of the ionisation of dinitrogen tetroxide in nitric acid. The nitrosonium ion, NO+, and the nitrosonium–nitrogen dioxide ion, N2O3+

J. D. S. Goulden and D. J. Millen, J. Chem. Soc., 1950, 2620 DOI: 10.1039/JR9500002620