What type of organic compounds are prepared by Gattermann-Koch reaction ?

Options

A. Aliphatic aldehyde
B. Aromatic ketone
C. Aliphatic ketone
D. Aromatic aldehyde

Answer

**Step-by-Step Solution:**

1. **Understanding the Gattermann-Koch Reaction**: The Gattermann-Koch reaction is a chemical reaction that involves the formylation of aromatic compounds using carbon monoxide (CO) and hydrochloric acid (HCl) in the presence of a Lewis acid catalyst, typically aluminum chloride (AlCl3).

2. **Reactants Involved**: The main reactants in this reaction are benzene (an aromatic compound), carbon monoxide (CO), hydrochloric acid (HCl), and aluminum chloride (AlCl3).

3. **Formation of Aromatic Aldehyde**: In the Gattermann-Koch reaction, the benzene ring acts as a nucleophile and attacks the electrophilic carbon in the carbon monoxide complex. This results in the formation of an aromatic aldehyde. Specifically, the reaction produces benzaldehyde (C6H5CHO), which is an aromatic aldehyde.

4. **Final Products**: The final products of the Gattermann-Koch reaction are benzaldehyde, hydrogen chloride (HCl), and aluminum chloride (AlCl3). The key organic compound formed is benzaldehyde, which falls under the category of aromatic aldehydes.

5. **Conclusion**: Therefore, the type of organic compound prepared by the Gattermann-Koch reaction is an aromatic aldehyde.

**Final Answer**: The Gattermann-Koch reaction prepares aromatic aldehydes, specifically benzaldehyde.

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