Question

Identify the product in the following reaction:

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is C

This question involves identifying the product of a given chemical reaction sequence. Here's a step-by-step explanation:

1. The starting compound is benzene diazonium chloride \((C_6H_5N_2^+Cl^-)\). 
2. The first reagent is \(Cu_2Br_2\)/HBr, which is a Sandmeyer reaction. This process involves the replacement of the diazonium group \((N_2^+)\) with a bromide ion. Thus, the product formed after this step is bromobenzene \((C_6H_5Br)\).
3. The next step involves treating the compound with \(\text{Mg/dry ether}\) to form the Grignard reagent. So, \((C_6H_5Br)\) reacts with magnesium in the presence of dry ether to form phenylmagnesium bromide \((C_6H_5MgBr)\).
4. Finally, the reaction with water \((H_2O)\) leads to the formation of benzene \((C_6H_6)\) as the final product. The Grignard reagent hydrolyzes to replace the MgBr with a hydrogen atom.

The final product after carrying out the entire sequence of reactions is benzene \((C_6H_6)\).

Let's examine the options and choose the correct one:

• Option 1: Incorrect, as it does not match benzene.
• Option 2: Incorrect, as it does not match benzene.
• Option 3: Correct, as it depicts benzene.
• Option 4: Incorrect, as it does not match benzene.