Indian Forest Service (Mains), Chemistry optional · 2024 · Paper II
Q3(c)(i). Endo selectivity in a Diels–Alder reaction
Question
Why does cyclopentadiene with maleic anhydride preferentially form the less stable endo adduct?
Model answer
The free solution for 2024 answers questions 1, 2, 4, 5 and 8, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.
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Topic notes: pericyclic reactions, with every Civil Services, IFoS and Geo-Scientist PYQ →
CoversDiels-Alder reactionendo rulesecondary orbital interactionscyclopentadiene maleic anhydridekinetic control
All parts of Question 3
- 3(a) Vilsmeier acylation of pyrrole10 marks
- 3(b) Five rearrangement products15 marks
- 3(c)(i) Endo selectivity in a Diels–Alder reaction10 marks
- 3(c)(ii) Electrocyclic closure of an E,Z diene5 marks