Question:
Above reaction is known as
Above reaction is known as
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The diazonium group is replaced by chlorine using a copper(I) salt. Recall which named reaction does this.
Updated On: Nov 12, 2026
- Fittig reaction.
- Sandmeyer reaction.
- Kolbe reaction.
- Reimer-Tiemann reaction
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
Benzenediazonium chloride reacts with cuprous chloride and hydrochloric acid to give chlorobenzene and nitrogen gas. Replacing the diazo group with Cl, Br or CN using the matching cuprous salt is a standard named reaction.
Step 2: Identify the reaction
The reaction is \(\text{C}_{6}\text{H}_{5}\text{N}_{2}^{+}\text{Cl}^{-}\xrightarrow{\text{CuCl/HCl}}\text{C}_{6}\text{H}_{5}\text{Cl}+\text{N}_{2}\). This is the Sandmeyer reaction.
Step 3: Why the other options fail
Fittig joins two aryl halides with sodium. Kolbe converts sodium phenoxide and \(\text{CO}_{2}\) to salicylic acid. Reimer-Tiemann converts phenol to salicylaldehyde using chloroform and alkali.
Final Answer:
The reaction is the Sandmeyer reaction. \[ \boxed{\text{(B) }\text{Sandmeyer reaction.}} \]
Benzenediazonium chloride reacts with cuprous chloride and hydrochloric acid to give chlorobenzene and nitrogen gas. Replacing the diazo group with Cl, Br or CN using the matching cuprous salt is a standard named reaction.
Step 2: Identify the reaction
The reaction is \(\text{C}_{6}\text{H}_{5}\text{N}_{2}^{+}\text{Cl}^{-}\xrightarrow{\text{CuCl/HCl}}\text{C}_{6}\text{H}_{5}\text{Cl}+\text{N}_{2}\). This is the Sandmeyer reaction.
Step 3: Why the other options fail
Fittig joins two aryl halides with sodium. Kolbe converts sodium phenoxide and \(\text{CO}_{2}\) to salicylic acid. Reimer-Tiemann converts phenol to salicylaldehyde using chloroform and alkali.
Final Answer:
The reaction is the Sandmeyer reaction. \[ \boxed{\text{(B) }\text{Sandmeyer reaction.}} \]
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