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Question
What is the action of following on but-2-ene?
dil. alkaline KMnO4
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Solution
The action of dil. alkaline KMnO4 on but-2-ene:
\[\begin{array}{cc}
\ce{\phantom{......................................................}H\phantom{...}H}\\
\phantom{......................................................}|\phantom{....}|\\
\ce{\underset{But-2-ene}{CH3 - CH = CH - CH3} + H - OH + [O] ->[alkaline KMnO4][(Hydroxylation)] CH3 - C - C - CH3}\\
\phantom{......................................................}|\phantom{....}|\\
\ce{\phantom{........................................................}\underset{Butane-2,3-diol}{OH\phantom{.}OH}}
\end{array}\]
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