亲电反应

焦脱镁叶绿酸a甲酯与溴素的亲电反应表明：在3位乙烯基上发生亲电加成反应，而与20位的meso氢则发生亲电取代反应。

The electrophilic reaction of methyl pyropheophorbide-a ( MPP-a ) demonstrates that the electrophilic addition reaction and the electrophilic substitution reaction occur on the vinyl group at 3-position and 20-meso-position , respectively .

共轭芳烃分子的定域电负性标度及亲电反应活性

The local electronegativity scale and the activity of electrophilic reaction of conjugated molecules

NBS与取代苯的亲电反应及其应用

The Electrophilic Reaction of NBS with Substituted Benzene and its Application

本文研究了I2参与的亲电反应，主要对亲电环化反应这一部分作了小结。

In our thesis , we made a summary of iodine participated electrophilic reactions and reported our studies on this .

将VNS与硝基芳环的亲电反应、亲核反应做比较，阐述了VNS的定义；

By comparing VNS with the electrophilic substitution and nucleophilic substitution of nitro aromatic , the definition of VNS is explained .

NMR在芳基亲电取代反应中的应用研究

Studies on Use of NMR for the Aromatic Electrophilic Substitution Reaction

分子的化学位移与反应活性有密切联系：化合物α位氢原子的δH值愈小，该化合物亲电取代反应活性愈高；

The chemical shift has a close relation with the reaction activeness : the smaller the δ _H value of the alpha position hydrogen in the compound , the higher the electricity substitution activeness .

Fukui函数在传统杂环及单取代杂环亲电取代反应中的活性部位预测

Predication of Reactive Sites in Electrophilic Substitution of Heterocycles and Mono Substituted Heterocycles by Condensed Fukui Function

利用共振论、PMO法、EHMO法，对菲亲电取代反应各位点的活性进行了解释。

Reactivity of electrophilic substitutions of different positions on phenanthrene are discussed according to the theory of Resonance , PMO method and EHMO method .

选择了10个含磺酸基团的化合物作为相转移催化剂，测定其在H2O／CH2COOH－CH3COONa／ClCH2Cl体系中的亲电偶合反应速率常数。

Ten sulfo-group containing compound were tested whether they could be used as the phase transfer catalyst ( PT CS ) for the electrophilic substitution in the solution of H2O / CH3COONa-CH3COOH / ClCH2Cl by measuring the coupling reaction rate constant .

甲氧基在苯甲醚亲电取代反应的定位作用

Orientation Effect of the Methoxy on the Reaction of Electrophilic Aromatic Substitution

气相芳香亲电取代反应研究进展

Advances in Gas - Phase Electrophilic Aromatic Substitution Reaction

~1H-NMR化学位移与芳烃亲电取代反应

The Relation between ~ 1H-NME δ and Electrophilic Substitution Reaction of Aromatic Hydrocarbon

这些问题的讨论将深化学生对芳烃亲电取代反应机理的认识。

It will become deepen to the students'recognization in mechanism of Aryl electrophilic substitution .

五元杂环化合物的亲电取代反应

Electrophilic substitute reaction of penta-heterocyclic compounds

亲电氟化反应的新进展

Recent Progress in Electrophilic Fluorination Reaction

亲电取代反应中相转移催化剂结构和性能的关系

Studies of Phase Transfer Catalysis in the Electrophilic Substitution ── Relation between the Catalytic Power and the Structure

一元取代苯邻、间、对位亲电取代反应活性的几种判据

Some Criterions of the Electrophilic Substitution Reactivity at the Ortho , Para and Meta Position of the Mono-substituted Benzenes

实验结果表明，对苯二甲醛在酸性催化剂的催化作用下与煤沥青发生亲电取代反应；

The results show that electrophilic substitution could occur between CTP and TPA under the action of toluene p sulfonic acid .

计算分子中原子净电荷的新方法及芳烃亲电取代反应定位效应的定量处理

A new method for calculating atomic charges in molecules and quantitative treatment of the orientation effect of electrophilic aromatic substitution reaction

对苯环上的亲电取代反应提出一种判断苯环上两类定位基的新方法。

The treatise advances a new method to judge two kinds of fixed group of benzoic ring on electrophilic substitutive reaction in benzoic ring .

对比无催化剂存在时的动力学数据，证明这类化合物是有效的亲电取代反应的相转移催化剂。

When compared with the kinetic data of the reaction without PTCS , these compounds proved to be effective catalysts for the electrophilic reaction .

产物是双键经过重排的取代烯丙基二甲基甲氧基硅烷6&10，该产物可进行一系列亲电取代反应。

The rearrangement of allylic double bond took placed in the course of these reaction . 6 & 12 are able to undergo a lot of electrophilic substitution reaction .

氯甲基化反应由亲电取代反应和亲核取代反应组成，亲核取代反应是反应的速率控制步骤，羟甲基碳正离子（+CH2OH）；是真正有效的亲电试剂。

The chloromethylation reaction consists of electrophilic substitution reaction and nucleophilic substitution reaction , the nucleophilic substitution is the rate-controlling step and the hydroxymethyl cation ( + CH20H ) is the really effective electrophile .

茂环上环戊烯基的双键与HBr和卤素发生正常的亲电加成反应。

The double bond of cyclopentenyl on Cp with HBr , halogen underwent normal electrophilic addition reaction .

电化学氧化降解中C-Cl键断裂是羟基攻击苯环发生亲电加成反应的结果，继而提出还原脱氯和氧化降解结合的工艺。

For electrochemical degradation of 4-CP , the C-Cl bond was broken and chlorine ion was taken away from the benzene ring as a result of electrophilic addition reaction of hydroxyl radical . The combination technologies of reduction dechlorination and oxidation degradation were proposed .

烯烃、炔烃亲电加成反应难易探讨

Several problems on the electrophilic addition reaction of alkenes

本论文还开展了以上述氨基甲酸炔丙酯产品为底物的亲电环化反应的初步探索研究。

The preliminary study concerning on the electrophilic cyclization reactions of the carbamate products were also conducted .

与亲电试剂醛反应，得到砜基取代的含烯丙醇结构单元的四取代烯烃。

The reaction of α - sulfonyl vinyl magnesium reagents with aldehydes afforded tetrasubstituted alkenes containing the structural unit of allyl alcohols .

介绍了烯烃与卤化氢的亲电加成反应中四种反马氏规则的类型，并作出了理论解释。

Four conditions against Markovnikov'rule on electrophilic addition to alkenes and alkyl halides are discussed , and a theoretical explanation is made as well .