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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.
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.
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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.
