Which of the following has maximum angle strain ?

Options

A.
B.
C.
D.

Answer

To determine which of the given compounds has the maximum angle strain, we need to understand the concept of angle strain and how it relates to the bond angles of different hydrocarbons.

### Step-by-Step Solution:

1. **Understanding Angle Strain**:
- Angle strain occurs when the bond angles in a molecule deviate from the ideal bond angles expected based on hybridization. For sp³ hybridized carbon atoms, the ideal bond angle is approximately 109.5°.

2. **Identifying the Compounds**:
- We need to analyze the bond angles of the compounds in question. Common examples include cyclopropane, cyclobutane, cyclopentane, and cyclohexane.

3. **Evaluating Bond Angles**:
- **Cyclopropane**: The bond angle is approximately 60°.
- **Cyclobutane**: The bond angle is approximately 90°.
- **Cyclopentane**: The bond angle is approximately 108°.
- **Cyclohexane**: The bond angle in its chair form is approximately 109.5°.

4. **Calculating Angle Strain**:
- Angle strain can be calculated as the difference between the ideal bond angle (109.5°) and the actual bond angle of each compound:
- Cyclopropane: 109.5° - 60° = 49.5° strain
- Cyclobutane: 109.5° - 90° = 19.5° strain
- Cyclopentane: 109.5° - 108° = 1.5° strain
- Cyclohexane: 109.5° - 109.5° = 0° strain

5. **Determining Maximum Angle Strain**:
- From the calculations, cyclopropane has the highest angle strain of 49.5°, followed by cyclobutane with 19.5°, cyclopentane with 1.5°, and cyclohexane with 0° strain.

6. **Conclusion**:
- Therefore, the compound with the maximum angle strain is **cyclopropane**.

### Final Answer:
Cyclopropane has the maximum angle strain.