The compound name trichloroethene is

Options

A. Westron
B. Perclene
C. Westrosol
D. Orlone

Explanation

To determine the IUPAC name of the compound trichloroethene, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Base Structure**:
- The name "ethene" indicates that the base structure is ethylene, which has two carbon atoms connected by a double bond (C=C).

2. **Draw the Base Structure**:
- The structure of ethene (C2H4) can be represented as:
```
H2C=CH2
```

3. **Add the Chlorine Substituents**:
- The prefix "trichloro" indicates that there are three chlorine (Cl) atoms attached to the ethene structure.
- To determine the positions of the chlorine atoms, we need to consider that they can be attached to the carbon atoms of the ethene.

4. **Determine the Positions of Chlorine Atoms**:
- The chlorine atoms can be placed on the carbon atoms in different positions. In trichloroethene, the structure is:
```
Cl Cl
| |
H2C=CCl
| |
Cl H
```
- This shows that two chlorine atoms are on one carbon (C1) and one chlorine atom is on the other carbon (C2).

5. **Assign the IUPAC Name**:
- The IUPAC name is derived from the positions of the substituents:
- The carbon atoms are numbered from the end closest to the first substituent.
- In this case, the structure is 1,1,2-trichloroethene.
- Therefore, the full IUPAC name is **1,1,2-trichloroethene**.

### Final Answer:
The compound name trichloroethene is **1,1,2-trichloroethene**.