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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 20, Number 6
JKCSEZ 20(6)
December 20, 1976 

 
Title
Kinetics of the Bromine-Exchange Reaction of Gallium Bromide with n-Butyl Bromide in 1,2,4-Trichlorobenzene and in Nitrobenzene

1,2,4-트리클로로벤젠용액 및 니트로벤젠용액 내에서의 브롬화갈륨과 브롬화 n-부틸의 브롬 교환반응
Author
Oh Cheun Kwun, Sang Up Choi

권오천, 최상업
Keywords
Abstract
방사성 브롬으로 표시한 브롬화 n-부틸을 사용하여 1,2,4-트리클로로벤젠용액 및 니트로 벤젠용액 내에서 브롬화칼륨과 n-브롬화부틸 사이에 일어나는 브롬교환 반응의 속도를 19,25 및 40℃에서 측정하였다. 본 실험의 결과는 이 브롬 교환반응이 브롬화칼륨에 관하여 2차반응이고 n-브롬화부틸에 관하여 1차 반응임을 보여준다. 19℃에서의 반응속도상수 값이 1,2,4-트리클로로벤젠용액에서 1.15×10-4 l2·mole-2·sec-1이고, 니트로벤젠용액에서 4.21×10-4 l2·mole-2·sec-1임을 알았다. 그리고 반응속도상수와 온도와의 관계로부터 이 교환반응에 대한 활성화 에너지, 활성화 엔탈피 및 활성화 엔트로피 값을 계산하였다.

The rate of the bromine-exchange reaction between gallium bromide and n-butyl bromide in 1,2,4-trichlorobenzene and in nitrobenzene was measured at 19, 25 and 40℃., using n-butyl bromide labelled with Br-82. The results indicated that the exchange reaction was second order with respect to gallium bromide and first order with respect to n-butyl bromide. The third-order rate constant determined at 19℃. is 1.15×10-4 l2·mole-2·sec-1 in 1,2,4-trichlorobenzene and 4.21×10-4 l2·mole-2·sec-1 in nitrobenzene. The activation energy, the enthalpy of activation and the entropy of activation for the exchange reaction were also determined.

Page
479 - 485
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