Indian Forest Service (Mains), Chemistry optional · 2025 · Paper II

Q6(a)(ii). Photochemistry of an amino ketone

5 marks
Topic: Photochemistry
Question only

Question

Give the product and explanation for irradiation of PhCOCH₂N-piperidyl.

Model answer

The free solution for 2025 answers questions 1, 3, 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: organic photochemistry and Norrish reactions, with every Civil Services, IFoS and Geo-Scientist PYQ →

Coversamino ketone photochemistryphotoinduced electron transferNorrish–Yang cyclisationNorrish Type IIα-aminoacetophenone

All parts of Question 6

6(a)(i) Photodecarbonylation of thujone5 marks
6(a)(ii) Photochemistry of an amino ketone5 marks
6(a)(iii) Di-pi-methane rearrangement5 marks
6(b)(i) Two ester NMR patterns5 marks
6(b)(ii) A symmetric malonate ester5 marks
6(c)(i) Number- and weight-average molar masses10 marks
6(c)(ii) Syn and anti dihydroxylation5 marks