Intramolecular electron transfer and dehalogenation of nitroaromatic anion radicals
作者:J. P. Bays、S. T. Blumer、S. Baral-Tosh、D. Behar、P. Netav
DOI:10.1021/ja00341a003
日期:1983.2
series of nitroaromatic compounds, containingCl, Br, or tosyl groups at various positions, were synthesized and studied by pulse radiolysis in aqueous alcohol solutions. One-electron reduction of the compounds produces the anion radicals which then undergo an intramolecular electron transfer and eliminate X/sup -/ (Cl/sup -/, Br/sup -/, or TsO/sup -/). The rates of X/sup -/ elimination vary over six orders
Intramolecular electron transfer in the anion radicals of nitrobenzyl halides
作者:P. Neta、D. Behar
DOI:10.1021/ja00534a037
日期:1980.7
Solvent Effects on the Reduction Mechanism of 9-Chloroanthracene, 3-Nitrobenzyl Chloride and 3-Chloroacetophenone.
作者:Henrik Jensen、Kim Daasbjerg、Rita G. Hazell、Hans Jørgen Jacobsen、Mikael Bols、Carole C. Perry、Teófilo Rojo
DOI:10.3891/acta.chem.scand.52-1151
日期:——
The reduction mechanism of 9-chloroanthracene, 3-nitrobenzyl chloride and 3-chloroacetophenone has been investigated in detail by means of cyclic voltammetry and controlled potential bulk electrolysis. The investigation was carried out in a number of aprotic solvents in order to elucidate the importance of solvation phenomena on the various parameters associated with the reaction mechanism, i.e., cleavage, hydrogen abstraction, protonation and dimerization rate constants as well as standard potentials. In this connection, the influence of the supporting electrolyte in terms of ion pairing and double layer effects has been considered. For the radical anions of 9-chloroanthracene and 3-nitrobenzyl chloride the logarithm of the cleavage rate constant shows a linear dependence on the Gutmann acceptor number and donor number, respectively, whereas no clearcut correlation can be observed in the case of the radical anion of 3-chloroacetophenone. The rate constant obtained for the protonation reaction between 3-nitrobenzyl anion and 3-nitrobenzyl chloride is to an even higher extent influenced by the nature of the solvent. The trends in the solvent effects are discussed.
Theory of intramolecular electron transfer reactions in anion radicals of nitrobenzyl halides