The IUPAC name of `underset(Cl)underset(|)CH_2 - overset(CH_2Cl) overset(|) CH - underset(Cl)underset(|) CH_2 ` is :

Options

A. Tris(chloromethyl) methane
B. 1,3-Dichloro-2 (chloromethyl) propane
C. 1-Chlorobis(chloromethyl) ethane
D. none of these

Explanation

To determine the IUPAC name of the given compound, we will follow these steps:

### Step 1: Identify the Structure
The compound is represented as:
```
Cl
|
CH2 - CH - CH2
|
Cl
```
We can see that there are three carbon atoms in the longest continuous chain, with chlorine (Cl) substituents attached.

### Step 2: Determine the Longest Carbon Chain
The longest carbon chain consists of three carbon atoms. We can denote this chain as:
- C1 (first carbon)
- C2 (second carbon)
- C3 (third carbon)

### Step 3: Identify Substituents
From the structure, we can identify the following substituents:
- At C1, there is a chlorine substituent (Cl).
- At C2, there is a chloromethyl group (–CH2Cl).
- At C3, there is another chlorine substituent (Cl).

### Step 4: Number the Carbon Chain
We will number the carbon chain from one end to ensure that the substituents get the lowest possible numbers:
- C1: Cl
- C2: CH2Cl (chloromethyl)
- C3: Cl

### Step 5: Write the Name of the Substituents
- The substituents are:
- At C1: Chloro (Cl)
- At C2: Chloromethyl (–CH2Cl)
- At C3: Chloro (Cl)

### Step 6: Combine the Substituents with Their Positions
Since we have two chloro groups at C1 and C3, we denote this as "1,3-dichloro". The chloromethyl group at C2 is denoted as "2-chloromethyl".

### Step 7: Name the Parent Chain
The parent chain consists of three carbon atoms, which is named "propane".

### Step 8: Combine All Parts to Form the IUPAC Name
Putting it all together, we have:
- Substituents: 1,3-dichloro and 2-chloromethyl
- Parent chain: propane

Thus, the complete IUPAC name is:
**1,3-dichloro-2-chloromethylpropane**

### Final Answer:
The IUPAC name of the compound is **1,3-dichloro-2-chloromethylpropane**.

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