Acylation of benzene to produce aliphatic aromatic ketones is known as

Options

A. Benzoin condensation
B. Hydroformylation
C. Clemmensen reduction
D. Friedel-Cralft 's reaction

Explanation

To solve the question regarding the acylation of benzene to produce aliphatic aromatic ketones, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Acylation**: Acylation is a chemical reaction where an acyl group (RCO-) is introduced into a compound. In this case, we are looking at the acylation of benzene.

2. **Reactants Involved**: The typical reactants for the acylation of benzene are an acyl chloride (like acetyl chloride, CH3COCl) and a Lewis acid catalyst (such as aluminum chloride, AlCl3).

3. **Role of Aluminum Chloride (AlCl3)**: AlCl3 acts as a Lewis acid and is known as a halogen carrier. It facilitates the reaction by forming a complex with the acyl chloride, which generates an acylium ion (RCO+).

4. **Formation of Acylium Ion**: When acetyl chloride reacts with AlCl3, it forms an acylium ion (CH3C^+=O). This ion is a strong electrophile.

5. **Electrophilic Substitution Reaction**: The acylium ion then attacks the benzene ring in an electrophilic substitution reaction. The benzene ring donates a pair of electrons to the acylium ion, resulting in the formation of a new bond.

6. **Product Formation**: The product of this reaction is an aromatic ketone. For example, if we use acetyl chloride, the product is acetophenone (C6H5COCH3).

7. **Naming the Reaction**: This specific acylation reaction of benzene is known as the Friedel-Crafts acylation reaction.

### Final Answer:
The acylation of benzene to produce aliphatic aromatic ketones is known as the **Friedel-Crafts acylation reaction**.

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