碎片化反应指什么样的反应？ 第1页

英语Fragmentation reactions，没搜到大概是中文教材里讲的少吧。这种反应的定义接受度也不高。

Fragmentation reactions, according to the definition of Grob and Schiess , are processes in which the reacting molecule breaks into three fragments according to Equation (149). The electrofugal group Y–B forms a stable cation or neutral molecule, the central group becomes an unsaturated fragment and the nucleofugal group X departs with an electron pair. Alkynes are most commonly formed in fragmentation reactions with substrates of the form Y-C-C double bond C-X, where X is the nucleofuge (e.g., halogen, OSO₂Ar, SeO₂Ar, N₂⁺ ) and Y is a heteroatom able to stabilise the positive charge on carbon. Most commonly, the electrofugal fragment is a carbonyl compound or carbon dioxide.^[1]