Which of the following cycloalkanes has the most angle strain?

Question

Quizplus · Accepted Answer

Cyclopropane (I) has the most angle strain due to its bond angles being forced to be 60 degrees, which is significantly smaller than the optimal tetrahedral angle of 109.5 degrees. This results in significant steric strain and instability. Cyclobutane (II) has slightly less angle strain, but still experiences some destabilization due to its bond angles being 90 degrees. Cyclopentane (III) has relatively less angle strain as its bond angles are closer to the tetrahedral angle. Cyclohexane (IV) has the least angle strain as it adopts a chair conformation that allows for almost perfect tetrahedral bond angles.

Which of the Following Cycloalkanes Has the Most Angle Strain