Which of the following compounds do not have the plane of symmetry?

Options

A.
B.
C.
D.

Answer

To determine which of the given compounds do not have a plane of symmetry, we will analyze each option step by step.

### Step 1: Understand the Concept of Plane of Symmetry
A plane of symmetry is an imaginary plane that divides a molecule into two mirror-image halves. If such a plane can be drawn, the compound has a plane of symmetry. If not, it does not.

### Step 2: Analyze Each Compound
1. **Option 1**:
- When we draw a line through the compound, we can see that it can be divided into two equal halves.
- **Conclusion**: This compound has a plane of symmetry.

2. **Option 2**:
- This compound contains two different substituents (chlorine and bromine).
- If we attempt to draw a line of symmetry, we find that the two halves are not identical due to the different substituents.
- **Conclusion**: This compound does not have a plane of symmetry.

3. **Option 3**:
- This compound has a double bond which disturbs the symmetry.
- The presence of different groups on either side of the double bond means that we cannot draw a line that divides the compound into two identical halves.
- **Conclusion**: This compound does not have a plane of symmetry.

4. **Option 4**:
- Similar to option 3, the presence of a double bond and the arrangement of atoms means that we cannot find a plane that divides the compound into two equal halves.
- **Conclusion**: This compound does not have a plane of symmetry.

### Step 3: Final Answer
Based on the analysis:
- **Option 1** has a plane of symmetry.
- **Options 2, 3, and 4 do not have a plane of symmetry.**

Thus, the compounds that do not have a plane of symmetry are **Options 2, 3, and 4**.

### Summary of Answer
The final answer is: **Options 2, 3, and 4 do not have a plane of symmetry.**

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