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Question
\[\ce{CH3CH2OH}\] can be converted into \[\ce{CH3CHO}\] by ______.
Options
catalytic hydrogenation
treatment with \[\ce{LiAlH4}\]
treatment with pyridinium chlorochromate
treatment with \[\ce{KMnO4}\]
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Solution
\[\ce{CH3CH2OH}\] can be converted into \[\ce{CH3CHO}\] by treatment with pyridinium chlorochromate.
Explanation:
Alcohols are oxidized to aldehydes and finally to acids.
\[\ce{CH3CH2OH ->[{[O]}] CH3CHO ->[{[O]}] CH3COOH}\]
Oxidations can be stooped at aldehyde stage by using pyridinium chlorochromate
\[\ce{(CrO3C5H5N.HCl)}\].
\[\ce{CH3CH2OH ->[PCC] CH3CHO}\]
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