Question

Question 32 (4 points) Rank the reactivity order of the following dienes with maleic anhydride, starting with the fastest. Y II IV IV > II > I > III OIV>II>II>1 O I > IV>I>II OI>IV > II > III

Answer 1

Answer (32) The reaction of diere with malei canhydride is aan enample of diel alder reaction diel-aldere reaction the diene must be in Scis position Example f more are s-lis s. Trans (more reactive) (less reactive) Diene with electron clonating group is reactive . * Cyclic dienes more reactive than because in both socis and s-trans form. enist due to rotation about single bond for this reactivit y decreases 1 acyclic diene acyclic cliene Y NE s-trans form Scis form

Hence I Cyclic diene with electron donating group) Cacyclic diene (only s-trang form enist, so least reactive)
Answer: IV>II>I>III