Page 25

Question 1

What does the Zaitsev rule predict in elimination reactions?

Answer 1

A: It predicts that the major product is the more substituted alkene, as it is the more stable double bond.

Question 2

Why is the major product more stable according to the Zaitsev rule?

Answer 2

A: Stability increases with the number of alkyl substituents on the double bond due to hyperconjugation and electron-donating effects.

Question 3

What happens when 1-iodo-1-methylcyclohexane undergoes elimination?

Answer 3

A: Two products form:
• Major product (A): Trisubstituted alkene (more stable).
• Minor product (B): Disubstituted alkene (less stable).

Question 4

What determines whether a β-carbon contributes to the major or minor product?

Answer 4

A: The β-carbon that leads to the formation of the more substituted alkene contributes to the major product.