Which of the following structures represents neoprene polymers?

Options

A. `-"("CH_(2)-underset(Cl)underset(|)C=CH-CH_(2)-")"_(n)`
B. `-"("CH_(2)-overset(CN)overset(|)CH-")"_(n)`
C. `-"("CH_(2)-overset(Cl)overset(|)CH-")"_(n)`
D. `-"("underset(C_(6)H_(5))underset(|)(CH)-CH_(2)-")"_(n)`

Explanation

To determine which structure represents neoprene polymers, we will follow these steps:

### Step 1: Understand the Structure of Neoprene
Neoprene is a synthetic rubber that is derived from chloroprene, which is chemically known as 2-chlorobutadiene. The structure of chloroprene can be represented as:
\[ \text{NH}_2\text{C}=\text{C}(\text{Cl})-\text{CH}=\text{CH}_2 \]

### Step 2: Identify the Polymerization Process
Neoprene is formed through the polymerization of chloroprene. The polymerization process involves the addition of multiple chloroprene monomers to form a long chain polymer. The resulting structure of neoprene can be represented as:
\[ \text{CH}_2\text{CCl}=\text{CH}-\text{CH}_2 \]

### Step 3: Analyze the Given Options
Now, we need to analyze the provided options to find which one corresponds to the structure of neoprene.

1. **Option 1:** \( \text{CH}_2\text{C}_6\text{H}_5 \) - This structure contains a benzene ring and does not relate to neoprene, so it can be eliminated.
2. **Option 2:** Contains chlorine but lacks a double bond, hence it cannot represent neoprene.
3. **Option 3:** Contains a double bond and chlorine, resembling the structure of neoprene.

### Step 4: Identify the Correct Option
After analyzing all the options, we find that **Option 3** is the one that represents neoprene due to the presence of both a double bond and chlorine in the structure.

### Conclusion
The structure that represents neoprene polymers is the one that includes both a double bond and chlorine, which corresponds to **Option 3**.

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