Hyperconjugation not steric repulsion leads to the staggered s ...

而不是老教科书提到效应。

The results show that steric hinderance effect of methyl groups in the poly-o-methylaniline is more prominent than induction effect and hyperconjugation.

结果表明,聚邻甲苯胺中甲基空间效应远大于诱导效应和效应。

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.

芳胺空间越小,亲核性越强,副反应越容易发生,产物除草活性越低。