Phthalimidoaziridines (I) show temperature-dependent 1H n.m.r. spectra. The coalescence temperatures for several 2- and 3-substituted phthalimidoaziridines have been found to lie in the range 75—125°. However, in the case of the 2,3-dichloro-derivatives, the coalescence temperatures are below 0°.
D. J. Anderson and T. L. Gilchrist, J. Chem. Soc. C, 1971, 2273 DOI: 10.1039/J39710002273
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