Question:
Which from following reagents is NOT involved in Sandmeyer reaction?
Which from following reagents is NOT involved in Sandmeyer reaction?
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Sandmeyer reaction uses cuprous salts, not copper powder.
Updated On: Nov 13, 2026
\(\mathrm{CuCl}/\mathrm{HCl}\)
\(\mathrm{CuBr}/\mathrm{HBr}\)
\(\mathrm{CuCN}/\mathrm{KCN}\)
Cu (Powder) \(/\mathrm{HCl}\)
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
The Sandmeyer reaction converts a diazonium salt to aryl chloride, bromide or cyanide using the corresponding cuprous salt.
Step 2: Reagents
\(\text{CuCl/HCl}\), \(\text{CuBr/HBr}\) and \(\text{CuCN/KCN}\) are Sandmeyer reagents.
Step 3: Compare the options
Copper powder with \(\text{HCl}\) is the Gattermann reaction, so option (D) is not Sandmeyer.
Final Answer:
Cu powder with HCl is used in the Gattermann reaction. \[ \boxed{\text{(D) }\text{Cu (Powder) }/\mathrm{HCl}} \]
The Sandmeyer reaction converts a diazonium salt to aryl chloride, bromide or cyanide using the corresponding cuprous salt.
Step 2: Reagents
\(\text{CuCl/HCl}\), \(\text{CuBr/HBr}\) and \(\text{CuCN/KCN}\) are Sandmeyer reagents.
Step 3: Compare the options
Copper powder with \(\text{HCl}\) is the Gattermann reaction, so option (D) is not Sandmeyer.
Final Answer:
Cu powder with HCl is used in the Gattermann reaction. \[ \boxed{\text{(D) }\text{Cu (Powder) }/\mathrm{HCl}} \]
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