Collect. Czech. Chem. Commun. 1988, 53, 243-250

Oxidation of cyclic N-(arylamino)imides. An EPR study of hydrazoxyl radicals

Ladislav Omelkaa, Michael Reinhardtb, Ralph Klugeb and Manfred Schulzb

a Department of Physical Chemistry Slovak Institute of Technology, 812 37 Bratislava, Czechoslovakia
b Department of Synthetic Chemistry Technical University Carl Schorlemmer, Leuna-Merseburg, 4200 Merseburg, G.D.R.


New types of hydrazoxyl radicals were identified by ESR spectroscopic method during oxidation of N-(arylamino)imides. The ESR parameters of radicals generated were obtained by a spectral simulation. The effect of substituents on the values of splitting constants of nitrogen atoms N1 and N2 is discussed. The splitting constants a(N1) well correlate with the σ-Hammett constants of substituents of the 1-phenyl group.