A type of reaction in which there is only one stage rather than a series of steps. The SN2 mechanism in nucleophilic substitutions is an example. See also pericyclic reactions.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。