ABSTRACT
Elimination reaction involves the removal of two substituents, from a pair of adjacent atoms in a molecule, without being replaced by other atoms or groups. As a consequence of the removal of atoms or groups from the adjacent atoms of molecule, unsaturation is introduced. The most common multiple bonds formed are those of alkene, alkyne and their heteroatom variations such as carbonyl and cyano groups. The removal of the groups from a molecule takes place in either one or twosteps. In most of the organic elimination reactions, at least one hydrogen is lost to form the double bond and as a result, the unsaturation of the molecule increases. It is also possible that a molecule undergoes reductive elimination, by which the valence of an atom in the molecule decreases by two. Elimination may be considered the reverse of an addition reaction.
