Question:

' $A$' and ' $B$ ' formed in the following set of reactions are:
 A' and ' B ' formed in the following set of reactions are:

Updated On: Mar 21, 2025
  •  A' and ' B ' formed in the following set of reactions are:\

  •  A' and ' B ' formed in the following set of reactions are:

  •  A' and ' B ' formed in the following set of reactions are:

  •  A' and ' B ' formed in the following set of reactions are:

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The Correct Option is A

Solution and Explanation

Reaction 1: Formation of Compound \( A \) - The benzyl alcohol derivative reacts with \( \text{HBr} \) under heat. - In the reaction, the \( -\text{CH}_2\text{OH} \) group undergoes substitution to form \( -\text{CH}_2\text{Br} \). The \( -\text{OH} \) group remains unaffected under these conditions. - Structure of \( A \): \( \text{C}_6\text{H}_4(\text{CH}_2\text{Br})(\text{OH}) \). 
Reaction 2: Formation of Compound \( B \) - The anisole derivative reacts with \( \text{HBr} \) under heat. - The \( -\text{OCH}_3 \) group undergoes cleavage to form \( -\text{OH} \), while bromination occurs at the ortho position (relative to the \( -\text{OH} \) group). - Structure of \( B \): \( \text{C}_6\text{H}_4(\text{Br})(\text{OH}) \). 5
Conclusion: - Compound \( A \): \( \text{C}_6\text{H}_4(\text{CH}_2\text{Br})(\text{OH}) \). - Compound \( B \): \( \text{C}_6\text{H}_4(\text{Br})(\text{OH}) \). 
The correct answer is Option (1).

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Concepts Used:

Introduction to Organic Chemistry

Organic chemistry is the branch of chemistry that involves the scientific study of organic compounds. Organic chemistry primarily deals with the structure and chemical composition of organic compounds, the physical and chemical properties of organic compounds, and the chemical reactions undergone by these compounds.

Reaction Intermediates in Organic Chemistry:

Intermediates can be understood as the first product of a consecutive reaction. For example, in a chemical reaction, if A→B and B→C, then, B can be said to be the intermediate for reaction A→C. The reactions in organic chemistry occur via the formation of these intermediates.

Reagents in Organic Chemistry:

Reagents are the chemicals that we add to bring about a specific change to an organic molecule. Any general reaction in organic chemistry can be written as:

Substrate + Reagent → Product

Where the substrate is an organic molecule to which we add the reagent. Based on the ability to either donate or abstract electrons, the reagents can be classified as:

  • Electrophiles
  • Nucleophiles