“neighboring group assistance”的概念、定义、翻译、参考文献-科学参考

单词	neighboring group assistance
释义	neighboring group assistance Encyclopedia 理学邻助作用释 neighboring group assistance; anchimeric assistance邻助作用进行亲核取代反应的底物分子，若同时存在亲核的基团和离去基团，且这两种基团在空间位置上的距离也适当，则在亲核取代反应的条件下，将优先发生分子内的亲核取代反应，生成环状产物，从而影响反应的立体选择性、区域选择性或活性的现象。又称邻基参与。
随便看	number of sheets number of significant digit number of solutions number of stages number of states number of survivors number of the first class number of theoretical plates number of the second class number of traffic exit and entrance amounts number of variations of signs Number of Visits number of zeros Number One Restaurant under Heaven Number one shop number operator number pair number partitioning problem number pattern number Pi number pi number picking number place number plane number polygon

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