Версия от 19:12, 29 января 2024; EducationBot(обсуждение | вклад)(Новая страница: «{{Английская Википедия/Панель перехода}} '''Alpha-cleavage''' ('''α-cleavage''') in organic chemistry refers to the act of breaking the carbon-carbon bond<ref name="isbn0-7641-2794-2">{{cite book |author=Hathaway, Bruce A. |title=Organic chemistry the easy way |publisher=Barron's Educational Series |location=Woodbury, N.Y |year=2005 |isbn=0-7641-2794-2 |url= https://books.google.com/books?id=fjy2oJuJ_0kC&pg=PA315&dq=...»)
(разн.) ← Предыдущая версия | Текущая версия (разн.) | Следующая версия → (разн.)
For example, of a mechanism of alpha-cleavage, an electron is knocked off an atom (usually by electron collision) to form a radical cation. Electron removal generally happens in the following order: 1) lone pair electrons, 2) pi bond electrons, 3) sigma bond electrons.
One of the lone pair electrons moves down to form a pi bond with an electron from an adjacent (alpha) bond. The other electron from the bond moves to an adjacent atom (not one adjacent to the lone pair atom) creating a radical. This creates a double bond adjacent to the lone pair atom (oxygen is a good example) and breaks/cleaves the bond from which the two electrons were removed.
