# E2 eliminationZoomA-Z

## Subject - Organic Chemistry

Description of the mechanism of an elimination reaction. Contrary to $E1$ eliminations in which the leaving group is eliminated first and a proton is subsequently abstracted in the second step, $E2$ eliminations are synchronized, i.e. both groups depart simultaneously. An example for this reaction type is the dehydrohalogenation of halogen alkanes.

Fig.1
Mechanism: E2 elimination

As a rule, $E2$ eliminations proceed stereospecifically in an anti fashion, i.e. the groups to be eliminated occupy an anti periplanar conformation