Question:
Which of the following does, not show $S _{ N _{2}}$ reaction?
Which of the following does, not show $S _{ N _{2}}$ reaction?
Updated On: Jul 12, 2022
- Allyl chloride, $ CH_{2}=CH-CH_{2}Cl$
- Chlorobenzene. $C_{6}H_{5}Cl$
- All of the above
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The Correct Option is B
Solution and Explanation
Allyl chloride show formation of very stable $CH _{2}= CH - \overset{+}{C}H _{2}$ ion and rest two have partial double bond character in their $C -X$ bond.
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Concepts Used:
Organic Chemistry – Some Basic Principles and Techniques - Reaction Mechanism
SN1 Reaction Mechanism:
SN1 reaction mechanism takes place by following three steps –
- Formation of carbocation
- Attack of nucleophile
- Deprotonation
SN2 Reaction Mechanism:
The SN2 reaction mechanism involves the nucleophilic substitution reaction of the leaving group (which generally consists of halide groups or other electron-withdrawing groups) with a nucleophile in a given organic compound.
Electrophilic Aromatic Substitution Reaction Mechanism:
The mechanism of an electrophilic aromatic substitution reaction contains three main components which are:
- A new sigma bond from C=C is formed during the reaction in the arene nucleophile.
- Due to the breaking of the C-H sigma bond, a proton is removed.
- The C=C bond is reformed and it restores the aromaticity of the compound.
Electrophilic Substitution Reaction Mechanism:
The electrophilic substitution reaction mechanism is composed of three steps, which will be discussed more below.
- Electrophile Generation
- Carbocation Formation
- Proton Removal