화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.13, No.3, 420-423, May, 2007
Behavior of N-Chlorosuccinimide Toward Diphenyl Selenide: A Kinetic and Mechanistic Study
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Diphenyl selenide was converted into diphenyl selenoxide using N-chlorosuccinimide in 50 % acetonitrile/water medium under different kinetic conditions and temperatures. The effect of the substrate and oxidant were studied. The order with respect to the concentration of substrate and oxidant was unity. A decrease in polarity of the medium increased the rate of the reaction. Added sodium perchlorate had no effect on the reaction, ruling out the possibility of participation of charged species in the rate-determining step. However, added acrylonitrile decreased the reaction rate considerably, indicating the participation of free radicals during the course of the reaction. Highly negative entropy, ΔS#, indicates a structured transition state. A suitable mechanism in consonance with the observed facts is proposed.
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