nucleophilicity

As steric hindrance of the aryl amine decreased and nucleophilicity increased , occurrence of the transfor-mation reaction increased and herbicidal activity of the product decreased .

芳胺空间位阻越小，亲核性越强，副反应越容易发生，产物除草活性越低。

To allyl alcohol and benzyl alcohol , the paired electrons of oxygen can be conjugated with double bond and thus the electron cloud density decreased , so the nucleophilicity was decreased .

丙烯醇和苯甲醇由于氧原子上的电子能与双键产生共轭而使氧上的电子云密度降低，亲核性减弱，因而转化率较低。

In this paper , electroaffinity and nucleophilicity of organic compound have been investigated , and their application in organic synthesis also has been discussed .

从电性角度讨论了有机物分子的亲电性和亲核性问题，并阐述了两者在有机合成中的应用。

At the same time , discuss about the impact factor to nucleophilicity such as the number of attract electron group 、 ability of attract electron and the nucleophilic substitution reaction part .

并且对亲核试剂的体积效应、溶剂效应对亲核性影响，底物上吸电子基团的数目、吸电子能力对亲电性的影响，以及亲核取代反应的发生部位受哪些因素影响进行探讨。

It is ascertained the whole tandem reaction sequence pivots on the nucleophilicity of thiazole carbenes , and the solubility of thiazolium precursors has an enormous effect on the reactions .

整个反应的历程取决于噻唑卡宾的亲核性，而卡宾前体在有机溶剂中的溶解性对反应也有较大的影响。