Q8(d). Photochemical cycloaddition and cleavage
Predict (i) the photoreaction of the given styryl nitro-methylisoxazole with tetracyanoethylene; (ii) the two principal Norrish-II fragments from 2-hexanone. [structure given in the paper]
Model answer
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Covers[2+2] photocycloadditiontetracyanoethyleneNorrish type IIγ-hydrogen abstraction2-hexanone
All parts of Question 8
- 8(a)(i) Methylcyclohexenes by mass spectrometry5 marks
- 8(a)(ii) Hydroxy-methoxyacetophenone assignment5 marks
- 8(b) Identification of an aromatic diester10 marks
- 8(c)(i) Oxidative coupling of acetic anhydride5 marks
- 8(c)(ii) Cyclopentenone photocycloadditions5 marks
- 8(d) Photochemical cycloaddition and cleavage5 marks
- 8(e) IR distinctions between functional groups5 marks