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Subject - Organic Chemistry

Elimination (from the Latin eliminare, to remove) reactions play an important part in synthetic organic chemistry. In these reactions two atoms or groups are removed from a molecule.

Eliminations proceed by one of three mechanisms: unimolecular (E1), bimolecular (E2) or radical (EN, ER, EE). The type of product being formed in an elimination reaction is determined by the positions from which the groups are eliminated: α-elimination (1,1), β-elimination (1,2) and γ-elimination (1,3).

In β-eliminations, the two removable groups are situated at adjacent carbon atoms, one is designated as α- and the other as β-atom. In α-eliminations, both residues are lost from the same carbon atom to give a carbene.

See also: E1 elimination , E2 elimination

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