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Which of the following alkenes is the most stable?

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Question: Which of the following alkenes is the most stable?

Options:

  1. 1-Butene
  2. 2-Butene
  3. Cyclohexene
  4. Isobutylene

Correct Answer: 2-Butene

Solution: 

2-Butene is more stable than 1-Butene due to hyperconjugation and steric factors.

Which of the following alkenes is the most stable?

Practice Questions

Q1
Which of the following alkenes is the most stable?
  1. 1-Butene
  2. 2-Butene
  3. Cyclohexene
  4. Isobutylene

Questions & Step-by-Step Solutions

Which of the following alkenes is the most stable?
  • Step 1: Understand that alkenes are hydrocarbons with a double bond between carbon atoms.
  • Step 2: Identify the two alkenes in the question: 1-Butene and 2-Butene.
  • Step 3: Recognize that stability in alkenes can be affected by hyperconjugation and steric factors.
  • Step 4: Hyperconjugation occurs when adjacent carbon atoms can share their electron density, which stabilizes the double bond.
  • Step 5: In 2-Butene, the double bond is between two carbon atoms that have more neighboring carbon atoms, allowing for more hyperconjugation.
  • Step 6: Steric factors refer to the spatial arrangement of atoms; 2-Butene has less steric hindrance compared to 1-Butene.
  • Step 7: Conclude that 2-Butene is more stable than 1-Butene because it benefits more from hyperconjugation and has less steric hindrance.
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