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प्रश्न
Answer the following
Explain carbylamine reaction with suitable examples.
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उत्तर
Carbylamine reaction:
i. Aliphatic or aromatic primary amines on heating with chloroform give foul (offensive) smelling products called alkyl/aryl isocyanides or carbylamines.
ii. This reaction is a test for primary amines. Secondary and tertiary amines do not give this test.
\[\ce{\underset{\text{1° Amine}}{R - NH2} + CHCl3 + 3KOH ->[\Delta] \underset{\text{Alkyl isocyanide}}{R - NC} + 3KCl + 3H2O}\]
e.g.
a.
\[\ce{\underset{\text{Ethylamine}}{CH3 - CH2} - NH2 + \underset{\text{Chloroform}}{CHCl3} + 3KOH->[\Delta] \underset{\text{Ethyl isocyanide}}{C2H5 - NC} + 3KCl + 3H2O}\]
b.
\[\ce{\underset{\text{Aniline}}{C6H5 - NH2} + \underset{\text{Chloroform}}{CHCl3} + 3KOH ->[\Delta] \underset{\text{Phenyl isocyanide}}{C6H5NC} + 3KCl + 3H2O}\]
संबंधित प्रश्न
Which one of the following compounds does not react with acetyl chloride?
Answer in one sentence.
How many moles of methyl bromide are required to convert ethanamine to N, N-dimethyl ethanamine?
Write a reaction to convert methanamine into ethanamine.
Answer the following.
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Write the name of the reaction in which aromatic primary amines produce offensive smell.
Write the name of the gas evolved when a primary amine is reacted with nitrous acid.
Write the reactions to bring about the following conversions.
Methyl chloride to Ethanamine
Write the reactions to bring about the following conversions.
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Write the reactions to bring about the following conversions.
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Identify the amine formed when ethyltrimethyl ammonium iodide is treated with silver hydroxide and further heated strongly.
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X and Z are ____________ respectively.
Which one of the following compounds when heated with KOH and CHCl3 gives carbylamine test?
Which of the following on heating with chloroform and alcoholic potassium hydroxide yields carbylamine?
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\[\ce{N-N Dimethyl aniline ->[A][273-278 K] 4-nitroso-N-N-dimethylaniline}\]
When propanamide is treated with bromine and alcoholic NaOH, it gives ______.
What is the product obtained in the following reaction?
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Select the compound which on treatment with nitrous acid liberates nitrogen.
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Write the reaction of Acetyl chloride on triethylamine.
Convert Methyl iodide to methyl isocyanide
