Science and Technology Production
Article
Authorship
Date
2001
Publishing House and Editing Place
AMER CHEMICAL SOC
Magazine
JOURNAL OF PHYSICAL CHEMISTRY A,
vol. 105
(pp. 5385-5392)
AMER CHEMICAL SOC
Summary
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Laser and conventional flash photolysis of Na2S2O8 aqueous solutions containing Cl- ions were employed to investigate the reactions of chlorine atoms and Cl2 2S2O8 aqueous solutions containing Cl- ions were employed to investigate the reactions of chlorine atoms and Cl22 ¥- radical ions with toluene, benzoic acid, and chlorobenzene. A mechanism is proposed which accounts for the faster decay of Cl2 radical ions with toluene, benzoic acid, and chlorobenzene. A mechanism is proposed which acc...
Laser and conventional flash photolysis of Na2S2O8 aqueous solutions containing Cl- ions were employed to investigate the reactions of chlorine atoms and Cl2 2S2O8 aqueous solutions containing Cl- ions were employed to investigate the reactions of chlorine atoms and Cl22 ¥- radical ions with toluene, benzoic acid, and chlorobenzene. A mechanism is proposed which accounts for the faster decay of Cl2 radical ions with toluene, benzoic acid, and chlorobenzene. A mechanism is proposed which accounts for the faster decay of Cl22 ¥- in aqueous solutions containing increasing concentrations of the organic substrates. Interpretation of the experimental data is supported by kinetic computer simulations. Chlorine atoms react with the three substituted aromatics studied here almost with diffusioncontrolled rate constants, k ) (1.8 ( 0.3) 1010 M-1 s-1. The high reactivity observed for Cl atoms contrasts with that of the Cl2 in aqueous solutions containing increasing concentrations of the organic substrates. Interpretation of the experimental data is supported by kinetic computer simulations. Chlorine atoms react with the three substituted aromatics studied here almost with diffusioncontrolled rate constants, k ) (1.8 ( 0.3) 1010 M-1 s-1. The high reactivity observed for Cl atoms contrasts with that of the Cl2 k ) (1.8 ( 0.3) 1010 M-1 s-1. The high reactivity observed for Cl atoms contrasts with that of the Cl22 ¥- radical ions, for which the rate constant for its reactions with the substituted benzenes is e 1 106 M-1 s-1. The organic radicals produced from these reactions, as well as the nature of the reaction products are discussed. The observed results seem to support an addition mechanism yielding chlorocyclohexadienyl radicals (Cl-CHD) as the most significant reaction channel following reaction of Cl atoms and the organic compounds. In air-saturated solutions, subsequent thermal reactions of Cl-CHD radicals lead both to chlorination and oxidation of the aromatics. radical ions, for which the rate constant for its reactions with the substituted benzenes is e 1 106 M-1 s-1. The organic radicals produced from these reactions, as well as the nature of the reaction products are discussed. The observed results seem to support an addition mechanism yielding chlorocyclohexadienyl radicals (Cl-CHD) as the most significant reaction channel following reaction of Cl atoms and the organic compounds. In air-saturated solutions, subsequent thermal reactions of Cl-CHD radicals lead both to chlorination and oxidation of the aromatics. e 1 106 M-1 s-1. The organic radicals produced from these reactions, as well as the nature of the reaction products are discussed. The observed results seem to support an addition mechanism yielding chlorocyclohexadienyl radicals (Cl-CHD) as the most significant reaction channel following reaction of Cl atoms and the organic compounds. In air-saturated solutions, subsequent thermal reactions of Cl-CHD radicals lead both to chlorination and oxidation of the aromatics. -CHD) as the most significant reaction channel following reaction of Cl atoms and the organic compounds. In air-saturated solutions, subsequent thermal reactions of Cl-CHD radicals lead both to chlorination and oxidation of the aromatics. -CHD radicals lead both to chlorination and oxidation of the aromatics.
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Key Words
substituted benzenesCl2 .- radical ionschlorine atoms