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Amines — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryAmines1 Mark
MCQ
Methyl cyanide on reaction with sodium and $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}$ forms:
  • ✓
    Ethyl amine
  • B
    Ethanoic acid
  • C
    Ethanimine
  • D
    None of these
✓

Answer

Correct option: A.
Ethyl amine
Methyl cyanide on reaction with sodium and ethanol forms ethylamine.
$\text{CH}_3-\text{C}\equiv\text{N}+4[\text{H}]\xrightarrow{\text{Na}/\text{ethanol}}\text{CH}_3-\text{CH}_2-\text{NH}_2$
In this reaction, the nitrile group is hydrogenated to form a primary amine.
This is a useful method to increase the length of a carbon chain in preparing a primary amine which contains one more carbon atom than the alkyl halide from which alkyl cyanide is obtained.

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