Transcription of Elimination Reactions
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Elimination Reactions
Elimination ReactionsJust as there are two mechanisms of substitution (SN2 and SN1), there are twomechanisms of Elimination (E2 and E1).E2 mechanism bimoleculareliminationE1 mechanism unimolecular eliminationThe E2 and E1 mechanisms differ in the timing of bond cleavage and bond formation,analogous to the SN2andSN1 and SN2 Reactions have some features in common, as do E1 and SN1 removes aproton from the -carbon atom,while the halogen atom leaves from the -carbonresulting in the formation of a -bond. Sucheliminationsarealsocalled -eliminationeliminationsarealsocalled eliminationreactionsThe Zaitsev (Saytseff) RuleWhen alkyl halides have two ormore different carbons, more than one alkeneproductis such cases, the major product is the more stable product the one with the moresubstituteddoublebond.
1 and E1 Reactions S N 1 and E1 reactions have exactly thesamefi tfirst step—ftiformation of a carbtibocation. They differ in what happens to the carbocation. Since in both the reactions, the rate determining steps are the same, they cannot be individually controlled. Because E1 reactions often occur with a competing S N 1 reaction, E1 ...
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