“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	diagnostic subsurface horizon diagnostic surface horizon diagnostic techniques for the laser induced plasmas diagnostic technology of veterinary pathology diagnostic test diagnostic testing Diagnostic trial without gold standard diagnostic ultrasound diagonability diagonal diagonal algebra diagonal approximation diagonal argument diagonal block diagonal block form diagonal block matrix diagonal brace piece under the intermediate purlin diagonal carbon diagonal coefficient diagonal composition diagonal continued fraction diagonal dominance diagonal dominance criterion diagonal element diagonal embedding

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