Studies on the Polycondensation of Friedel-CraftsReaction for Aralkyl Ethers and Aromatics (Ⅱ) Kinetics and Mechanism of Polycondensation

王稼书; 焦扬声; 李瑨

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Studies on the Polycondensation of Friedel-CraftsReaction for Aralkyl Ethers and Aromatics (Ⅱ) Kinetics and Mechanism of Polycondensation

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- Studies on the Polycondensation of Friedel-CraftsReaction for Aralkyl Ethers and Aromatics (Ⅱ) Kinetics and Mechanism of Polycondensation
- CIESC Journal Issue 3, (1984)
- 作者机构：
  
  华东化工学院,华东化工学院,华东化工学院现在上悔合成树脂研究所工作
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 September 1984，
  
  Published：25 September 1984
- 稿件说明：
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王稼书, 焦扬声, 李瑨. Studies on the Polycondensation of Friedel-CraftsReaction for Aralkyl Ethers and Aromatics (Ⅱ) Kinetics and Mechanism of Polycondensation[J]. CIESC Journal, 1984, (3).
DOI：

王稼书, 焦扬声, 李瑨. Studies on the Polycondensation of Friedel-CraftsReaction for Aralkyl Ethers and Aromatics (Ⅱ) Kinetics and Mechanism of Polycondensation[J]. CIESC Journal, 1984, (3). DOI：

摘要

本文研究了芳烷基醚与芳香族化合物在Friedel-Crafts反应型催化剂作用下缩聚反应动力学.提出了反应速度方程V=k[X]_0[Ar].求得一系列的反应速度常数和反应活化能数据.用核磁共振波谱测定了反应的中间产物——正碳离子

提出了该缩聚反应为正碳离子进攻芳环的亲电取代机理模型.

Abstract

The kinetics of polycondensation of aralkyl ethers such as p-di(methoxy) xylene and 4

4/-di(methoxymethyl) diphenyl ether with ten kinds of aro-matics has been studied in the presence of catalysts for Friedel-Crafts reaction. The kinetic expression was found to be V=k [catalyst]0[aromatics]. A series of rate constants and activation energies was calculated. With the nuclear magnetic resonance method

the intermediate product

the carbon-ium ion

was determined

and the following polycondensation mechanism of electrophilic substitution by the carbonium ion was suggested: It was found that the order of reactivity for aromatics reacting with aralkyl ethers is as follows: phenol > p-cresol > 4-tert-butyl-phenol >o-cresol > salicylic acid > acenaphthene > acenaphthylene > 1

5-tetramethyl-benzene > phenyl ether > naphthalene. The electrophobic group present on the rings of aromatics is favorable to the reactivity of the aromatics.

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