Although Five- and Six-Membered Rings Are Generally the Most Stable,why

question 30

Multiple Choice

Although five- and six-membered rings are generally the most stable,why is cyclopentane less stable than cyclohexane?

• A) The angles in cyclopentane deviate significantly from the tetrahedral angle.
• B) Five-membered rings have trans annular interactions.
• C) Five-membered rings have eclipsing hydrogens.
• D) Planar cyclohexane has bond angles closer to 109  .
• E) Larger rings are always more stable than smaller rings.

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