Primary aliphatic amines, when treated with nitrous acid, form unstable aliphatic diazonium salts that quantitatively release nitrogen gas and alcohols. The quantitative evolution of nitrogen is used for the estimation of amino acids and proteins.
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Aliphatic and aromatic primary amines undergo the carbylamine reaction, producing foul-smelling isocyanides, when heated with chloroform and ethanolic potassium hydroxide. This reaction, known as the carbylamine reaction or isocyanide test, is utilized as a test for primary amines.
Amides, when reduced with lithium aluminium hydride, yield amines. This reduction process provides a route for the preparation of amines from amides.
Steric hindrance to hydrogen bonding occurs when the alkyl group is larger than -CH₃, affecting the order of basic strength. The nature of the alkyl group, changing from -CH₃ to -C₂H₅, leads to a shift in the order of basic ...
The order of basicity for aliphatic amines, determined by the stability of substituted ammonium cations, is primary > secondary > tertiary, contrary to the inductive effect-based order.