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- W2163706670 abstract "Benzyl bromide was sulfonated at 298 K in emulsions formed with dioctyldimethylammonium bromide, or chloride. If mixing was sufficient, the emulsion was maintained throughout the reaction period. Lower conversions were obtained whenever benzyl bromide phase separated from the mixture. Chloride as surfactant counterion gave higher reaction rate, but decreased the conversion to C7H7SO3−Na+due to formation of benzyl chloride. The conversion to C7H7SO3−Na+ displayed a broad maximum as R2(Me)2−N+Br concentration increased. Except at low concentration, the reaction rate increased with the concentration of Na2SO3 in accord with the SN2 mechanism. The reaction rate increased with the reactant concentrations until interface saturation was achieved, suggesting that product formation did not interfere with the access of the reactants to the interface.Du bromure de benzyle a ete sulfone a 298 K dans des emulsions formees avec du bromure ou du chlorure de dioctyldimethylammonium. Si le melange est suffisant, l'emulsion se maintient tout au long de la periode de la reaction. On obtient des conversions plus faibles lorsque la phase de bromure de benzyle est separee du melange. Le chlorure comme contre-ion donne une plus grande vitesse de reaction mais diminue la conversion en C7H7SO3−Na+ due a la formation de chlorure de benzyle. La conversion en C7H7SO3−Na+ montre un maximum large lorsque la concentration de R2(Me)2N+Br est augmentee. Sauf a de faibles concentrations, la vitesse de reaction augmente avec la concentration de Na2SO3 en accord avec le mecanisme de SN2. La vitesse de reaction augrnente avec les concentrattons de reactif jusqu'a ce que la saturation de l'interface re realise, ce qui suggere que la formation des produits n'interfee pas avec I'acces des reactifs a l'interface." @default.
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- W2163706670 date "2001-10-01" @default.
- W2163706670 modified "2023-09-27" @default.
- W2163706670 title "Nucleophilic substitution sulfonation in emulsions: Formation of sodium benzyl sulfonate" @default.
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- W2163706670 doi "https://doi.org/10.1002/cjce.5450790507" @default.
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