KINETICS OF THE QUATERNIZATIONS OF TERTIARY-AMINES WITH BENZYL-CHLORIDE

NCU Institutional Repository > 工學院 > 化學工程與材料工程研究所 > 期刊論文 > Item 987654321/26709

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/26709

題名:	KINETICS OF THE QUATERNIZATIONS OF TERTIARY-AMINES WITH BENZYL-CHLORIDE
作者:	WANG,TT;HUANG,TC
貢獻者:	化學工程與材料工程學系
關鍵詞:	ALKALINE-HYDROLYSIS;MENSCHUTKIN
日期:	1993
上傳時間:	2010-06-29 17:34:51 (UTC+8)
出版者:	中央大學
摘要:	In this study the rate constants and the activation energies of the direct quaternizations of the tertiary amines with benzyl chloride are obtained. The reactivities are in the order (CH3)3N > (C2H5)3N > (C4H9)3N > (C3H7)3N > (C8H17)3N > (C6H13)3N > pyridine > N,N-dimethylaniline almost-equal-to quinoline. Owing to the steric effect of the ethyl group, the rate constant of (CH3)3N is about 100 times that of (C2H5)3N and, owing to the polar, the steric and the resonance effects of the phenyl group, the rate constant of (CH3)3N is about 3000 times that of NN-dimethylaniline. The rate constants of other trialkylamines are of the same order, because their polar effects and steric effects are approximately counterbalanced. The range of the activation energies of the quaternization of trialkylamines is from 9.94 to 12.0 kcal mol-1, and that of the heterocyclic amines and NN-dimethylaniline is from 13.2 to 15.6 kcal mol-1. The rate of the quaternization of trimethylamine is greatly reduced by adding benzene or hexane, and log k2 increases linearly with increasing volume average solubility parameter of the mixed solvent, and the direct quaternization rate constant is obtained by extrapolation. For convenient comparison, relevant kinetic data from the literature and those obtained in this study are separately listed in tables. They show that the spread of the kinetic data of this work is reasonable.
關聯:	CHEMICAL ENGINEERING JOURNAL AND THE BIOCHEMICAL ENGINEERING JOURNAL
顯示於類別:	[化學工程與材料工程研究所] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	451	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....