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β eliminationZoomA-Z

Subject - Organic Chemistry

Eliminations (from the Latin eliminare, "to remove") are chemical reactions in which one substituent, e.g. atoms, ions or a group of atoms, is removed from two atoms each of a molecule forming a new bond. In the case of two adjacent atoms, a multiple bond is formed. This type of elimination is the opposite reaction to an addition.

α-Elimination leads to the formation of a carbene because both leaving groups are located at the same carbon atom. γ-Elimination produces a cyclopropane skeleton. β-elimination is synthetically the most important elimination reaction with E1, E1cb and E2 types of mechanism.

Fig.1
Mechanism: E1 elimination
Fig.2
Mechanism: E2 elimination

See also: E1 elimination , E2 elimination , Hofmann product