electrophilic agent

Comparsion of the electrophilic addition activity between monoene and conjugated diene;单烯与共轭二烯亲电加成反应活性的比较Lw8汉语字典

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 。Lw8汉语字典

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。Lw8汉语字典

When alkene’s electrophilic addition reaction is judged through the traditional view of Markovnikov’s rule, the asymmetric alkene shoulod contain a hydrogen atom.用传统意义上的马氏规则判断烯烃的亲电加成反应时,不对称试剂中必须含氢原子,并且烯烃的结构和试剂的构成也有要求,因而有局限性。Lw8汉语字典

Then 3-bromo-2,6-dimethoxy-4-diphenylphosphinopridine was synthesized using 2,6-dimethoxypydine as a raw material through bromation, ortho-lithiation and electrophilic substitution.在卤化吡啶的锂化反应的区域选择性研究基础上 ,以 2 ,6 二甲氧基吡啶为原料 ,经溴化反应、邻位锂化反应和亲电取代反应制备了 2 ,6 二甲氧基 3 溴 4 二苯基膦基吡啶 ,最终收率可达 5 7。Lw8汉语字典

Condensed Fukui function(CFF)was used to predict the reactive sites in electrophilic substitution ofpenta-heterocycles(pyrrole and furan),hexa-heterocycle(pyridine)and a series of mono-substituted heterocycles(ortho-,meta-and para-).采用收敛的Fukui 函数对传统杂环和其单取代产物在亲电取代反应中的活性部位做了预测。Lw8汉语字典

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.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。Lw8汉语字典

A series of poly(aryl ether sulfone ether ketone ketone) containing meta-phenyl links and methyl pendant guoup were prepared by electrophilic polycondensation of 2,2′-Dimethyl-4,4′-Diphenoxydiphenylsulfone (o-CH_3-DPODPS)?terephthaloyl choride(TPC) and Isophthaloyl (IPC) in 1,2-dichloroethane and in the presence of AlCl_3 and DMF.以2,2′-二甲基-4,4′-二苯氧基二苯砜(o-CH3-DPODPS)、对苯二甲酰氯(TPC)和间苯二甲酰氯(IPC)为单体,通过亲电缩聚反应,合成了一系列主链含四面体构型的砜基及其醚键邻位含有甲基的新型聚芳醚砜醚酮酮聚合物。Lw8汉语字典

Pentachloroaniline was synthesized by electrophilic reaction of 2,3,5,6 tetrachloroaniline with hydrochloric acid in DMF solution containing ammonium persulfate.在过硫酸铵的盐酸N ,N 二甲基甲酰胺溶液中 ,2 ,3,5 ,6 四氯代苯胺通过亲电反应生成五氯代苯胺 ,其结构借元素分析、红外光谱和质谱等手段得到表