Indian Forest Service (Mains), Chemistry optional · 2024 · Paper II

Q6(a)(ii). Reductive opening of a cyclic epoxide

5 marks
Topic: Synthetic uses of reagents
Question only

Question

Give the product and mechanism for the methyl-substituted cyclohexene oxide with LiAlH₄, followed by aqueous work-up. [structure given in the paper]

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: addition to alkenes and alkynes (Markovnikov, stereochemistry, dienes), with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversLiAlH4 epoxide openinghydride attacktrans-diaxial openingcyclohexene oxideregioselectivity

All parts of Question 6

6(a)(i) Selenium dioxide allylic oxidation5 marks
6(a)(ii) Reductive opening of a cyclic epoxide5 marks
6(b)(i) Living anionic polymerization10 marks
6(b)(ii) Silicone structure and stability5 marks
6(c)(i) Photorearrangement of 4-caranone10 marks
6(c)(ii) Substituent effects on Norrish-II reaction5 marks