Indian Forest Service (Mains), Chemistry optional · 2023 · Paper II
Q7(a). Photochemistry of a rigid aryl ketone
Question
Write the products of irradiation of the drawn 2-benzoylnorbornane. [structure of 2-benzoylnorbornane given in the paper]
Answer in brief
Gamma-H transfer gives a 1,4-biradical that can cleave to an unsaturated cyclopentyl ketone or close to a tricyclic cyclobutanol.
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CoversNorrish type IIYang cyclization2-benzoylnorbornaneγ-hydrogen abstraction1,4-biradical
All parts of Question 7
- 7(a) Photochemistry of a rigid aryl ketone5 marks
- 7(b) Sequential anionic polymerization5 marks
- 7(c) Neoprene and chloroprene5 marks
- 7(d) Why polymers have average molar masses5 marks
- 7(e) Two unsaturated ester isomers5 marks
- 7(f) Sanger determination of the N terminus5 marks
- 7(g) Chemical-shift separation in Hz5 marks
- 7(h) Hydration of phenylacetylene5 marks