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- Markovnikov's rule is an important rule of product forecasting in alkene electrophilic addition reaction. 马氏规则是在烯烃的亲电加成反应中预测产物的重要经验规则,然而它通常的表述有一定的局限性。
- 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。
- 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。
- 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。
- Electrophilic addition and substitution of organoselenoreagents,elimination of seleno group in the molecule andtheir application in the synthesis of natural products werereviewed. 简要综述了有机硒试剂的亲电加成和取代反应,从分子中消去硒基团的方法及其在天然物合成中的应用。
- The color reaction mechanism for 2,2-bis(p-methoxyphenyl )-1 ,1-dichloroethylene(DMDE) with H2SO4 is studied. The reaction is reversible,the color substance has relation with intermediate in electrophilic addition reaction. 本文对2,2-二(4-甲氧基苯基)-1,1-二氯乙烯(简称DMDE)与H_2SO_4显色反应的机理进行了探讨,证实了该反应为可逆反应,其显色产物与亲电加成反应的中间体有关;
- The stability of the active intermediates, bend length of monoene and conjugated diene were discussed. It was concluded that conjugated diene was easier to take electrophilic addition than monoene. 过从反应活性中间体的稳定性以及共价键的键长,从理论上说明共轭二烯比单烯易亲电加成。
- Because the reaction initiated by the attachment of an electrophile, the process is called an electrophilic addition reaction. 因为反应是由亲电试剂的附加而开始的,所以这个过程叫做亲电加成反应。
- Because the reaction is initiated by the attachment of an electrophile, the process is called an electrophilic addition reaction . 因为反应是由亲电试剂的附加而开始的,所以这个过程叫做亲电加成反应。
- The development of MMCAI for electrophilic addition reaction 烯烃亲电加成反应教学课件的开发设计
- About the Electrophilic Addition Reaction of Ethene Ethyne 关于乙烯、乙炔的亲电加成反应
- Keywords electrophilic addition;alkyl halide;anti-Markovnikov'rule; 亲电加成;烯烃;卤化氢;反马氏规则;
- Keywords ethene;ethyne;electrophilic addition reaction; 乙烯;乙炔;亲电加成;
- mechanism of electrophilic addition to carbon-carbon multiple bonds [化] 碳-碳重键亲电子加成反应机理
- An issue to deserve discussion is recommended on the stereochemistry of electrophiles addition for organic textbooks. 介绍了有机化学教材中亲电加成反应的立体化学部分一个值得得商榷的问题.
- Keywords elkene alkyne electrophilic addition reaction actiity comparism; 烯煤;炔烃;亲电加成反应活性比较;
- She has two cars and in addition a motorboat. 她有两辆轿车外加一艘汽艇。
- The little girl is not very clever at addition. 这个小女孩不太善于做加法。
- Ann will be a very useful addition to our team. 安来到我们队给我们增加了一员干将。
- In addition, we supply small parts for replacement. 此外,我们还提供备用小零件。