Which of the following represents chloroprene , the monmer of neoprene ?

Options

A. `CH_(2)=CH-CH=CH_(2)Cl`
B. `CH_(2)=underset(CH_(3))underset(|)(C)-CH=CHCl`
C. `CH_(2)=underset(Cl)underset(|)(C)-CH=CH_(2)`
D. `CH_(2)=underset(CH_(3))underset(|)(C)-underset(Cl)underset(|)(C)=CH_(2)`

Explanation

To determine which structure represents chloroprene, the monomer of neoprene, we need to analyze the chemical structure of chloroprene and compare it with the given options.

### Step-by-Step Solution:

1. **Identify the Chemical Formula of Chloroprene**:
Chloroprene is chemically known as 2-chloro-1,3-butadiene. Its molecular formula is C4H5Cl.

2. **Draw the Structure of Chloroprene**:
- Chloroprene has four carbon atoms (C) and one chlorine atom (Cl).
- The structure can be represented as follows:
- The first carbon (C1) is bonded to two hydrogen atoms (H).
- The second carbon (C2) is bonded to one chlorine atom (Cl) and one hydrogen atom (H).
- The third carbon (C3) is bonded to one hydrogen atom (H) and is involved in a double bond with the fourth carbon (C4).
- The fourth carbon (C4) is bonded to two hydrogen atoms (H).
- The double bonds are located between C1 and C2, and between C3 and C4.

The structure can be depicted as:
```
H2C=C(Cl)-C=C-H
```

3. **Analyze the Given Options**:
- Check each option to see if it matches the structure of chloroprene.
- Look for the position of the chlorine atom and the arrangement of double bonds.

4. **Select the Correct Option**:
- The correct representation of chloroprene should have the chlorine atom on the second carbon and the double bonds in the correct positions as described.
- After examining the options, the correct structure that matches chloroprene is:
```
CH2=CH(Cl)-C=C-H
```

### Conclusion:
The correct answer representing chloroprene, the monomer of neoprene, is the structure where the chlorine atom is on the second carbon and the double bonds are correctly positioned.