Indian Forest Service (Mains), Chemistry optional · 2023 · Paper II

Q5(c). Photocyclization of isomesityl oxide

Question

Complete the irradiation of CH₃COCH₂C(CH₃)=CH₂ (isomesityl oxide) in hexane and explain the principal pathway.

The characteristic cyclization product is 1-methyl-3-methylenecyclobutan-1-ol.

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CoversNorrish–Yang cyclizationNorrish type IIisomesityl oxide1,4-biradicalcyclobutanol