Which of the following statement is correct for chlorobenzene?

Options

A. less reactive than benzyl chloride
B. more reactive than dimethyl bromide
C. more reactive than isopropyl chloride
D. nearly same 'reactive as that of methyl chloride

Explanation

To determine which statement is correct for chlorobenzene, we need to analyze its chemical structure and properties. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Structure of Chlorobenzene
Chlorobenzene is an aromatic compound consisting of a benzene ring with a chlorine atom attached. The structure can be represented as:

```
Cl
|
C6H5
```

### Step 2: Analyze Resonance in Chlorobenzene
In chlorobenzene, the chlorine atom has lone pairs of electrons that can participate in resonance with the π-electrons of the benzene ring. This results in a resonance structure where the bond between the carbon and chlorine has partial double bond character.

### Step 3: Identify the Implications of Resonance
The presence of resonance stabilizes the chlorobenzene molecule. The bond between the carbon and chlorine is not purely a single bond; it has partial double bond character. This makes the chlorobenzene more stable and less reactive compared to aliphatic halides.

### Step 4: Compare Reactivity with Aliphatic Halides
Aliphatic halides (like methyl chloride, isopropyl chloride, etc.) do not have the same resonance stabilization. Therefore, they are generally more reactive than chlorobenzene because breaking a single bond in aliphatic halides requires less energy compared to breaking the partial double bond in chlorobenzene.

### Step 5: Evaluate the Given Statements
Now, we can evaluate the statements provided in the question:

1. **More reactive than dimethyl bromide, isopropyl chloride, methyl chloride, and benzyl chloride** - This is incorrect as chlorobenzene is less reactive than these aliphatic halides.
2. **Less reactive than benzyl chloride** - This is correct. Benzyl chloride can undergo resonance stabilization as well, but chlorobenzene is still less reactive due to its aromatic stability.
3. **More reactive than dimethyl bromide** - Incorrect, as explained.
4. **Nearly the same reactivity as isopropyl chloride** - Incorrect, as chlorobenzene is less reactive.

### Conclusion
The correct statement regarding chlorobenzene is that it is **less reactive than benzyl chloride**.

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