electrophilic

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

一元取代苯邻、间、对位亲电取代反应活性的几种判据

互联网摘选

The rate constants of radical and electrophilic addition to alkenes are dominated by different factors.

烯烃的自由基加成和亲电加成速率受不同的因素控制.

互联网摘选

The electron population on the imino-nitrogen atom is the largest, thus the mercuric acetate should first coordinate with imino-nitrogen atom in the process of the reaction and then subsequent electrophilic substitution takes place in the ortho-position of the.

分子中亚胺氮原子的电荷密度最大，在汞化反应过程中，亚胺氮原子首先与醋酸汞配位，然后再进行邻位亲电进攻，生成邻位汞化产物；

互联网摘选

As an electrophilic agent, the methyl group of methoxy species can directly attack benzene ring to produce toluene via electrophilic substitution reaction.

甲氧基物种的甲基作为一种亲电试剂，可以直接进攻苯环发生亲电取代烷基化反应生成甲苯。

互联网摘选

Synthesis and biological activity of some thebaine and oripavine derivatives with flexible electrophilic chains

具有柔性亲电侧链的蒂巴因和奥利文衍生物的合成和生物活性

互联网摘选

The study of the activity of aromatic and heteroaromatic compounds towards electrophilic substitution reactions

芳杂环亲电取代活性的研究

互联网摘选

Michael reaction acceptors ( MRAs) are the biologically active molecules which contain electrophilic moieties, which directly or indirectly involved in the life processes, they are also regulators in many signaling pathways in cells, and play an important role in chemical biology studies.

迈克尔反应受体分子为一类含有亲电共轭体系官能团的生理活性分子，它们直接或间接参与许多生命过程，同时也是细胞中许多信号转导途径的调节者，在化学生物学研究中起着重要作用。

互联网摘选

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

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.

互联网摘选

Synthesis of the substance from aniline and hexafluoroacetone involves electrophilic addition, acylation and reduction.

其合成一般是以苯胺和六氟丙酮为起始原料,经过亲电加成 、 酰化和还原三步反应.

互联网摘选

Several Conditions against Markovnikov' Rule on Electrophilic Addition to Unsymmetrical Alkenes

不对称烯烃亲电加成中几种反马氏规则的类型

互联网摘选

Vicarious nucleophilic substitution ( VNS) of hydrogen is a new type of reaction which is differ-ent from the usual electrophilic and nucleophilic reactions of the nitro arenes.

氢的替代亲核取代反应（VNS）是与硝基芳环的亲电反应、亲核反应不同的一种新反应。

互联网摘选

Study of Reaction of Aromatic Electrophilic Substitution

芳香族亲电取代反应的研究

互联网摘选

DNA adduct is a covalent complex formed by DNA and electrophilic activity production of toxicological chemicals transformed in body, and it is not only an exposure biomarker but also an effect biomarker.

DNA加合物是化学毒物经生物转化后的亲电活性产物与DNA分子形成的共价结合物，它既是一种暴露标志物，又是一种效应标志物。

互联网摘选

Iso-butene and methanol etherification proceeds according to the electrophilic addition mechanism, Iso-butene makes protonation reaction as the proton acceptor under the acid catalyst function, being born the positive carbon ion, intermediate products react rapidly with nucleophilic reagent ( CH3O-) to produce MTBE.

异丁烯在酸性催化剂作用下作为质子的接受体发生质子化反应，生成正碳离子；作为中间产物的正碳离子，再迅速同亲核试剂CH3O-反应，生成MTBE。

互联网摘选

METHODS: Electrophilic substitution, reduction, oxidation and nucleophilic addition reaction were used in the synthesis of title compounds.

方法：通过亲核取代、还原、氧化、亲核加成等反应得到目的化合物。

互联网摘选

Study on electrophilic aromatic substitution of polydivinylbenzene

聚二乙烯苯的取代反应研究

互联网摘选

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

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

互联网摘选

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

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；

互联网摘选

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

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；

互联网摘选

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

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。

互联网摘选

This paper discusses the relation between the empirical parameter of chemical shifts in carbon-13 NMR spectra and orientation effect in electrophilic substitution.

本文研究了取代苯13C&NMR谱化学位移的经验参数与芳烃取代活性顺序以及亲电取定位效应的关系。

互联网摘选

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.

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。

互联网摘选

Electrophilic Substitution Locating Index of Aromatic Hydrocarbon and Its Application

芳烃亲电取代定位指数的提出及其应用

互联网摘选

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

亲电取代反应中相转移催化剂结构和性能的关系

互联网摘选

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

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。

互联网摘选

Synthesis of bis ( indolyl) methanes via electrophilic substitution reactions of indoles with aromatic aldehydes and ketones catalyzed by aminosulfonic acid was carried out in 23-96% yield at 30~ 38 ° C in EtOH aqueous solution under ultrasound irradiation.

超声辐射下在30～38℃的乙醇水溶液中，氨基磺酸催化吲哚与芳香醛或酮反应合成二吲哚甲烷，产率23～96%。

互联网摘选

The carbon is electrophilic centre.

碳是亲电的中心.

词典精选例句

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.

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。

互联网摘选

The carbon atom of ethyl diazoacetate is not only electrophilic and nucleophilic, but also is a dipolar ion, so the reaction about it is varied.

重氮乙酸乙酯的碳原子既具有亲电性又具有亲核性，而且是一个偶极离子，所以它的反应是多种多样的。

互联网摘选

A simple recognization of the position of the aromatic ring in electrophilic substitution

芳环上亲电取代位置的简易判别法

互联网摘选