Aromatic Compounds Containing Nitrogen - Result Question 34

Assertion and Reason

Read the following questions and answer as per the direction given below :

(a) Statement I is correct; Statement II is correct; Statement II is the correct explanation of Statement I.

(b) Statement I is correct; Statement II is correct; Statement II is not the correct explanation of Statement I.

(c) Statement I is correct; Statement II is incorrect.

(d) Statement I is incorrect; Statement II is correct.

35.

Statement I: In strongly acidic solution, aniline becomes more reactive towards electrophilic reagents.

Statement II: The amino group being completely protonated in strongly acidic solution, the lone pair of electrons on nitrogen is no longer available for resonance.

$(2001,1 M)$

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Answer:

Correct Answer: 35. (d)

Solution:

  1. In strongly acidic medium, aniline is fully protonated, becomes deactivated for $S _E$ Ar reaction.

alt text

Lone pair on nitrogen is not available for resonance. Positive charge makes the group strongly electron withdrawing.



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