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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 39, Number 8
JKCSEZ 39(8)
April 20, 1995 

 
Title
Kinetic Studies for the Reaction of para-Substituted Benzyl bromides under High Pressure

고압하에서 브롬화벤질류의 반응에 대한 속도론적 연구
Author
Young Cheul Kim*, Jin Burm Kyong, Se Kyong Kim, Sung Yong Choi

김영철*, 경진범, 김세경, 최성용
Keywords
Abstract
2-피콜린과 파라치환 브롬화벤질류의 반응을 온도와 압력 및 치환기 변화에 따라 속도론적으로 연구하였다. 속도상수로부터 활성화 파라미터들과 Hammett ρ값을 계산하였다. 결과적으로 반응중심에는 양의 전하가 진전되고 결합형성 보다는 결합파괴가 촉진됨을 알 수 있었다. 압력증가에 따라 반응 속도와 전하이동능력은 증가하고, 낮은 온도에서의 전하이동에 대한 압력효과가 더욱 크게 작용하고 있음을 알 수 있다.

Kinetics for the reaction of para-substituted benzyl bromides with 3-picoline have been studied with the changes of substituent, pressure and temperature. The activation parameters and the Hammett ρ-values were determined from the values of rate constants. The results of these studies showed that the positive charge developed in the reaction center and bond cleavage was greater than bond formation. The reaction rate and the ability of charge transfer were increased with elevating pressure. The effect of pressure for the charge transfer was more enhanced at low temperatures.

Page
598 - 603
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