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Statement-1: Bromobenzene upon reaction ...

Statement-1: Bromobenzene upon reaction with `Br_(2)//Fe` gives 1,4-dibromobenzene as the major product.
Statement-2: In bromobenzene the inductive effect of the bromo group is more dominant than the mesomeric effect in directing the incoming electrophile.

A

Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for statement-1

B

statement-1 is true, statement-2 is true, statement-2 is NOT a correct explanation for statement-1

C

statement-1 is true, statement-2 is false

D

statement-1 is false, statement-2 is true

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem, we will analyze both statements provided in the question. ### Step 1: Analyze Statement 1 **Statement 1:** Bromobenzene upon reaction with `Br2/Fe` gives 1,4-dibromobenzene as the major product. - **Explanation:** Bromobenzene is an aromatic compound where a bromine atom is attached to a benzene ring. When bromobenzene reacts with bromine in the presence of iron (Fe), it undergoes electrophilic aromatic substitution. The bromine atom on the benzene ring can donate electron density to the ring through resonance (mesomeric effect), making the ortho and para positions more reactive towards electrophiles. - The reaction can produce two products: 1,2-dibromobenzene (ortho) and 1,4-dibromobenzene (para). However, due to steric hindrance (the size of the bromine atom) and the inductive effect, the para product (1,4-dibromobenzene) is favored over the ortho product (1,2-dibromobenzene). ### Step 2: Analyze Statement 2 **Statement 2:** In bromobenzene, the inductive effect of the bromo group is more dominant than the mesomeric effect in directing the incoming electrophile. - **Explanation:** The bromine atom has both a mesomeric (resonance) effect and an inductive effect. The mesomeric effect (−M effect) is the donation of electron density through resonance, which stabilizes the positive charge that develops during the electrophilic substitution. The inductive effect (−I effect) refers to the withdrawal of electron density through the sigma bond. - In the case of bromobenzene, the mesomeric effect is stronger than the inductive effect. Therefore, the statement that the inductive effect is more dominant is incorrect. ### Conclusion - **Statement 1 is True:** The major product is indeed 1,4-dibromobenzene. - **Statement 2 is False:** The mesomeric effect is more significant than the inductive effect in directing the electrophile. ### Final Answer - Statement 1 is true, and Statement 2 is false.
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Knowledge Check

  • Assertion: Bromobenzene, upon reaction with Br_(2)//Fe gives 1,4-dibromobenzene as the major product. Reason: In bromobenzene, the inductive effect of the bromo group is more dominant than the mesomeric effect in directing the incoming electrophile.

    A
    If both assertion and reason are correct and reason is correct explanation for assertion
    B
    If both assertion and reason are correct but reason is not correct explanation for assertion.
    C
    If assertion is correct but reason is incorrect.
    D
    if both assertion and reason are incorrect.
  • Assertion: Bromobenzene upon reaction with Br_(2)//Fe gives 1,4-dibromobenzene as the major product Reason In bromobenzene the inductive effect of the bromo group is more dominant than the mesomeric effect in directing the incoming electrophile .

    A
    If the the assertion and reason are true and reason is a true explanation of the assertion .
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion .
    C
    If the assertion is true but reason is false
    D
    If assertion is false but reason is true .
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    B
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