CH2=CHCl
Here's a breakdown of the structure:
* Carbon backbone: Two carbon atoms are connected by a double bond.
* Hydrogen atoms: Two hydrogen atoms are attached to one carbon, and one hydrogen atom is attached to the other carbon.
* Chlorine atom: A single chlorine atom is attached to one of the carbon atoms.
Here's a visual representation:
```
H
|
H - C = C - Cl
|
H
```
Key points:
* The double bond between the carbons is the defining feature of the vinyl group.
* The chlorine atom is attached to one of the carbons in the vinyl group, hence the name chloroethene.
* This structure gives chloroethene its unique properties, making it a valuable precursor in the production of polymers like polyvinyl chloride (PVC).