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

Q5(e). Norrish-II cleavage of a branched aldehyde

Question

Predict major and minor products when CH₃CH₂CH(CH₃)CH₂CHO is irradiated.

For the Norrish-II channel: acetaldehyde + but-2-ene is the favoured pair; acetaldehyde + but-1-ene is the alternative pair.

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CoversNorrish Type II reactionγ-hydrogen abstraction1,4-biradicalaldehyde photochemistryphotofragmentation