Studies in tertiary amine oxides. Part V—carbon-13 nuclear magnetic resonance spectra of some N-aryl tertiary amines,the corresponding N-oxides and the meisenheimer rearrangement products

The carbon-13 NMR spectra of some N-(2- or 4-nitrophenyl) tertiary amines and their corresponding N-oxides have been analysed. These N-oxides undergo thermal rearrangement to O-arylhydroxylamines, for which the ¹³C NMR spectral assignments were also carried out. The N-oxidation effect on the aromatic and aliphatic fragments is calculated.