Question
Write short notes on the following: Carbylamine reaction.
✓
Answer
Carbylamine reaction: The carbylamines reaction test used for detection of primary amines. In this reaction, the analyte/ given compound is heated with alcoholic potassium hydroxide and chloroform. If a primary amine is present, the isocyanide(carbylamines) is formed which gives unpleasant smell.
$\text{CH}_3\text{CH}_2\text{NH}_2+\text{CHCl}_3+3\text{KOH}(\text{alc})\xrightarrow[]{\text{warm}}\\\text{Ethyl amine}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3\text{CH}_2\stackrel{{\rightarrow}}{=}\text{C}+3\text{KCl}+3\text{H}_2\text{O}\\ \ \ \ \ \ \ \ \ \ \ \text{Ethyl isocyanide}$
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