Question:
Most strained cycloalkane is:
Most strained cycloalkane is:
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Smallest ring = Largest strain (Angle = 60$^\circ$).
Updated On: May 25, 2026
- Cyclopropane
- Cyclobutane
- Cyclohexane
- Cyclopentane
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The Correct Option is A
Solution and Explanation
Step 1: Concept
Ring strain (Baeyer strain) occurs when the bond angles in a cyclic molecule deviate from the ideal tetrahedral angle of 109.5$^\circ$.
Step 2: Meaning
Higher deviation results in higher potential energy and lower stability.
Step 3: Analysis
In cyclopropane, the bond angles are forced to be 60$^\circ$. This deviation of 49.5$^\circ$ is the largest among the common cycloalkanes listed.
Step 4: Conclusion
Due to the extreme angle strain and torsional strain, cyclopropane is the most strained and reactive. Final Answer: (A)
Ring strain (Baeyer strain) occurs when the bond angles in a cyclic molecule deviate from the ideal tetrahedral angle of 109.5$^\circ$.
Step 2: Meaning
Higher deviation results in higher potential energy and lower stability.
Step 3: Analysis
In cyclopropane, the bond angles are forced to be 60$^\circ$. This deviation of 49.5$^\circ$ is the largest among the common cycloalkanes listed.
Step 4: Conclusion
Due to the extreme angle strain and torsional strain, cyclopropane is the most strained and reactive. Final Answer: (A)
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