Question:
Identify the name of the above reaction.
Identify the name of the above reaction.
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CO with HCl and anhydrous AlCl3 under pressure is the Gattermann-Koch reaction.
Updated On: Oct 1, 2026
- Etard reaction
- Gatterman-Koch formylation reaction
- Stephen reaction
- Rosenmund reaction
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The Correct Option is B
Solution and Explanation
Step 1: Read the figure
The figure shows benzene reacting with \(CO, HCl\) in the presence of anhydrous \(AlCl_3\) at high pressure to give benzaldehyde, \(C_6H_5CHO\).
Step 2: Name
This is the Gattermann-Koch formylation. The electrophile is formyl chloride, \(HCOCl\), or the formyl cation, generated in situ.
Step 3: Other options
Etard uses \(CrO_2Cl_2\) on toluene. Stephen uses \(SnCl_2/HCl\) on a nitrile. Rosenmund reduces an acid chloride with \(H_2/Pd-BaSO_4\).
Final Answer:
The reaction is Gattermann-Koch formylation. \[ \boxed{\text{(B)}\ \text{Gatterman-Koch formylation}} \]
The figure shows benzene reacting with \(CO, HCl\) in the presence of anhydrous \(AlCl_3\) at high pressure to give benzaldehyde, \(C_6H_5CHO\).
Step 2: Name
This is the Gattermann-Koch formylation. The electrophile is formyl chloride, \(HCOCl\), or the formyl cation, generated in situ.
Step 3: Other options
Etard uses \(CrO_2Cl_2\) on toluene. Stephen uses \(SnCl_2/HCl\) on a nitrile. Rosenmund reduces an acid chloride with \(H_2/Pd-BaSO_4\).
Final Answer:
The reaction is Gattermann-Koch formylation. \[ \boxed{\text{(B)}\ \text{Gatterman-Koch formylation}} \]
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