Write the name of the reagent used to transform Allyl alcohol to Propenal.
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Solution and Explanation
Reaction \[ CH_2=CHCH_2OH \xrightarrow{MnO_2} CH_2=CHCHO \]
Explanation Activated manganese dioxide selectively oxidizes allylic and benzylic alcohols to aldehydes without affecting the carbon-carbon double bond. Therefore allyl alcohol is converted into propenal efficiently.
Final Answer \[ \boxed{MnO_2 \text{ (Activated Manganese Dioxide)}} \]
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(ii) Secondary and tertiary amines
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(ii) Ethylamine is soluble in water whereas aniline is not.
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(v) Aniline does not undergo Friedel-Crafts reaction.
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