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E1 eliminationZoomA-Z

Subject - Organic Chemistry

E1 eliminations are two-step processes. In the first, rate-determining step the molecule loses the leaving group, thereby forming a carbenium ion (carbocation) which, in the second step, rapidly loses a proton to Lewis bases to generate a double bond. If the base contains several protons available for deprotonation, the reaction gives a product mixture of several isomers.

Fig.1
Mechanism: E1 elimination

E1 eliminations compete with SN1 reactions. The result of the reactions is determined by the reaction conditions, such as solvent, structure of the substrate and the base itself.

See also: elimination , E2 elimination