The reaction of acetone with `PCl_5` gives

Options

A. `CH_3 COCH_2 Cl`
B. `CH_3COCHCl_2`
C.
D. `ClCH_2 COCH_2 Cl`

Explanation

To solve the question regarding the reaction of acetone with phosphorus pentachloride (PCl₅), we will follow these steps:

### Step 1: Identify the Structure of Acetone
Acetone is a simple ketone with the chemical formula \( C_3H_6O \). Its structure can be represented as:
\[ \text{CH}_3 - \text{C}(=O) - \text{CH}_3 \]
This shows that acetone has a carbonyl group (C=O) flanked by two methyl groups (CH₃).

### Step 2: Understand the Reaction with PCl₅
Phosphorus pentachloride (PCl₅) is a reagent that can react with carbonyl compounds. In this reaction, PCl₅ will react with the carbonyl oxygen of acetone.

### Step 3: Reaction Mechanism
When acetone reacts with PCl₅, the carbonyl oxygen atom will be replaced by two chlorine atoms. The mechanism involves the formation of a chlorinated product where the carbonyl group (C=O) is converted into a dichlorinated compound.

### Step 4: Write the Reaction
The reaction can be summarized as follows:
\[ \text{CH}_3 - \text{C}(=O) - \text{CH}_3 + PCl_5 \rightarrow \text{CH}_3 - \text{C}(Cl)_2 - \text{CH}_3 + POCl_3 \]
Here, the product formed is 2,2-dichloropropane (the chlorinated derivative of acetone), and phosphorus oxychloride (POCl₃) is produced as a byproduct.

### Step 5: Conclusion
Thus, the reaction of acetone with PCl₅ gives 2,2-dichloropropane and phosphorus oxychloride as the byproduct.

### Final Answer
The reaction of acetone with PCl₅ gives 2,2-dichloropropane and POCl₃.

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