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。
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.
含活性基团的醛可与烯丙基碘和锡粉直接进行亲核加成反应，得到高烯丙基型的醇。水的存在不利于此反应的进行。
Aldehyde containing functional groups can react with allyl iodine and tin directly, water is of no advantage to the reaction.
指出，共振核—CF 2—的化学位移不仅受第一、二邻位基团的影响，也受第三邻位的影响。
These results indicated that the chemical shifts of central -cf2 - group are not only affected by the first and the second neighboring groups, but also by the third neighboring group.
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