Abstract
The electron spin resonance spectra of anion radicals generated by the electrolytic reductions of sym-trinitrobenzene, trinitromesitylene, trinitrobenzoic acid, trinitrotoluene, trinitroanisole, picramide, and the picrate ion are reported and discussed. Measurements were carried out in three solvents; dimethylformamide, dimethylsulfoxide, and acetonitrile. In addition, perturbations in the spectrum of the trinitrobenzene anion produced by the presence of various monovalent and divalent cations were studied. The trinitrobenzene and trinitromesitylene anions show an alternating linewidth effect which increases as the interaction between the anion and its environment increases. This effect implies correlated fluctuations in the spin densities of three equivalent nitrogroups.
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