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NEET
Exam
NEET
Subject
Chemistry
Chapter
Haloalkanes and Haloarenes

NEET · Chemistry · Haloalkanes and Haloarenes

Given below are two statements: one is labelled as Assertion (A)...

Given below are two statements: one is labelled as Assertion (A) andtheotherislabelledasReason(R)\left(A\right) and the other is labelled as Reason \left(R\right).

Assertion \left(A\right):Experimentalreactionof: Experimental reaction of{CH}_{3}Clwithanilineandanhydrouswith aniline and anhydrous{AlCl}_{3}doesnotgivedoes not giveo and p−methylaniline.</p><p>Reason(R)-methylaniline.</p><p>Reason \left(R\right) : The −NH2- {NH}_{2} group of aniline becomes deactivating because of salt formation with anhydrous AlCl3{AlCl}_{3} and hence yields mm-methyl aniline as the product.

In the light of the above statements, choose the most appropriate answer from the options given below

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R) . Assertion

Options

  1. ABoth (A)\left(A\right) and \left(R\right)aretrueand (R)are true and \left(R\right) is the correct explanation of \left(A\right)$.
  2. BBoth (A)\left(A\right) and \left(R\right)aretruebut(R)are true but \left(R\right) is not the correct explanation of \left(A\right).
  3. C(A)\left(A\right) is true, but (R)\left(R\right) is false.
  4. D(A)\left(A\right) is false, but (R)\left(R\right) is true.

Correct answer

C. (A)\left(A\right) is true, but (R)\left(R\right) is false.

Step-by-step solution

Under the Friedel Craft Reaction condition, the aniline (a Lewis base) binds to the electrophileAlCl3{AlCl}_{3} (a Lewis acid) to give a coordination complex (a salt). Then, the positive charge on the nitrogen is electron withdrawing, and it pulls the electron density of the aromatic ring by −Ieffect- I\text{effect}. It therefore, deactivates the ring for further alkylation reactions. Finally, the complex precipitates out of the reaction mixture and the alkylation reaction is not observed.

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R) . Assertion

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