单电子转移反应

本文对重要有机反应之一的单电子转移过程作了综述。单电子转移反应与极性反应的根本区别在于,前者每次只发生一个电子的转移,而后者通常每次发生一对电子的转移。影响这二种历程的主要因素是反应物的立体因素,电子结构及氧化还原能力。单电子转移按其反应方式又被细分(?)inner-sphere ET (?) outer-sphere ET 二种历程。一些典型的单电子转移反应已被分类介绍。

Single Electron Transfer Reactions

In this paper the recent developments in the field of single electron transfer process are reviewed.The apparent difference between SET and (?)polar pathways lies in that,only one electron is transferred at one time ub the former while there is a pair of electrons inthe (?)atter.The Sterio effect,electronic structure and electron affinity or ionization potentialsof the reactants are considered to be the main factors affecting the reaction mechanisms.Re-cently,the definitioh of inner-sphere ET and outer-sphere ET mechanisms has been suggestedto describe SET processes.Some typical significant examples of SET reactions are classifiedand illustrated.