nitrous acid test

Question

Primary aliphatic amine treated with nitrous acid evolves:

RankGuru · Accepted Answer

1. **Reactant**: Primary aliphatic amine ($R-NH_2$).
2. **Reaction**: $R-NH_2 + HNO_2 (NaNO_2 + HCl) 	o [R-N_2^+Cl^-] \xrightarrow{H_2O} R-OH + N_2 \uparrow + HCl$.
3. **Mechanism**: The intermediate aliphatic diazonium salt is extremely unstable even at low temperatures.
4. **Observation**: It breaks down immediately, typically forming an alcohol and liberating **Nitrogen gas ($N_2$)** as brisk effervescence.
5. **Efficiency**: Measuring the volume of $N_2$ evolved is part of the Van Slyke method for estimating amino acids and proteins.

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More nitrous acid test Practice Questions

Aliphatic primary amine with nitrous acid gives: