A chiral spintrap, 5,5‐dimethyl‐3‐phenylpyrroline‐1‐oxide (5), and several hydroxylamines were synthesized. The structures and conformations of these compounds were investigated mainly by 1H NMR spectroscopy. This spintrap was used to trap carbon‐ and oxygen‐centered radicals. The corresponding hydrogen spin adduct was prepared by oxidizing the hydroxylamine to the nitroxideradical. By the combination
The synthesized spintrap 3,5‐diphenyl‐5‐methylpyrroline‐1‐oxide (3), its derivatives and spinadducts were studied using NMR, ESR and ENDOR spectroscopic methods. The structure of 3 was determined using x‐ray analysis. The nitrone 3 was found to have a rigid structure. Two species were observed in the EPR and ENDOR spectra of the spinadducts of 3, but not in the NMR spectra of its diamagnetic derivatives