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प्रश्न
Explain why the electrophilic substitution reactions in haloarenes occur slowly and require more drastic conditions as compared to those in benzene.
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उत्तर
The halogen atom because of its –I effect has some tendency to withdraw electrons from the benzene ring. As a result, the ring gets somewhat deactivated compared to benzene; hence, the electrophilic substitution reactions in haloarenes occur slowly and require more drastic conditions than those in benzene.
संबंधित प्रश्न
How the following conversion can be carried out?
Benzene to 4-bromonitrobenzene
Assertion: Aryl iodides can be prepared by reaction of arenes with iodine in the presence of an oxidising agent.
Reason: Oxidising agent oxidises I2 into HI.
Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is ______.
Assertion: In monohaloarenes, further electrophilic substitution occurs at ortho and para positions.
Reason: Halogen atom is a ring deactivator.
Give reason for the following:
During the electrophilic substitution reaction of haloarenes, para-substituted derivative is the major product.
Assertion (A): Chlorobenzene is resistant to electrophilic substitution reaction.
Reason (R): C-Cl bond in chlorobenzene acquires partial double bond characters due to resonance.
