Question

The stability order of alkene in following compounds is:

• A. I < II < III < IV
• B. II < I < III < IV
• C. II < III < I < IV
• D. II < IV < I < III

Answer 1

The correct option is A I < II < III < IV

IV and III are conjugated dienes and hence more stable than I and II. If we compare III and IV, IV is more substituted and hence more stable. Similarly II is more substituted than I. So the stability order varies as: I < II < III < IV.