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Assertion (A) Friedel - Crafts reaction ...

Assertion (A) Friedel - Crafts reaction benzene with n - propyl chloride on heating produce isopropyl benzene
Reason (R ) Benzene undergoes electrophilic substitution easily.

A

If both assertion and reason are true, and reason is the true explanation of the assertion.

B

If both assertion and reason are true, but reason is not the true explanation of the assertion.

C

If assertion is true, but reason is false.

D

If both assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
B
Correct explanation. The initially formed n-propyl cation first undergoes rearrangment by 1,2-hybride shift to form the more stable isopropyl cation which then attacks the benzene ring to form isopropylbenzene.
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The Friedel-Crafts reaction of benzene with n- butyl chloride at 0^(@)C produces :

A Friedel-Crafts reaction of benzene with chloroform produces

A Friedel- Crafts reaction of benzene with chloroform produces :

F.C. reaction of benzene with isobutyl chloride produces

Following two question have assertion followed by the reason. Answer them according to the following options Assertion Friedel Craf't alkylation of benzene with n-propyl chloride, fail to produce propyl benzene. Reason Carbocation rearrangement produces rearrangedd isopropyl benzene as major product.

Statement-I : Benzene reacts with n- propyl chloride in presence of AlCl_(3)//Delta to give isopropyl benzene. Because Statement-II : Benzene undergoes electrophilic substituion readily.

Knowledge Check

  • Friedel-Crafts reaction of benzene with isobutyl chloride produces

    A
    isobutylbenzene
    B
    tert-butylbenzene
    C
    n-butylbenzene
    D
    sec-butylbenzene.

  • The Friedel-Crafts reaction of benzene with n- butyl chloride at 0^(@)C produces :

    A
    `C_(6)H_(5)-CH_(2)CH_(2)CH_(2)CH_(3)`
    B
    `C_(6)H_(5)overset(CH_(3))overset(|)(CH)-CH_(2)CH_(3)`
    C
    `C_(6)H_(5)-CH_(2)-underset(CH_(3))underset(|)(CH)-CH_(3)`
    D
    all of these

  • Friedel-Crafts acylation of benzene with benzoyl chloride gives

    A
    `C_6H_5COCH_3`
    B
    `CH_3COCH_3`
    C
    `C_6H_5COC_6H_5`
    D
    none of these
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