What is the best reagent to convert nitrile to primary amine?
Best reagent to convert nitrile to aniline is sodium/alcohol or $\mathrm{LiAlH}_4$.
Give the structure 'A' in the following reaction.
Complete conversion can be shown as
What is Hinsberg reagent?
Benzene sulphonyl chloride $\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{SO}_2 \mathrm{Cl}\right)$ is known as Hinsberg reagent. It is used to distinguish between primary, secondary and tertiary amine.
Why is benzene diazonium chloride not stored and is used immediately after its preparation?
Benzene diazonium chloride are highly unstable and stable for a very short time span in solution at low temperature. Due to its instability, it is used immediately after its preparation.
Why does acylation of $-\mathrm{NH}_2$ group of aniline reduces its activating effect?
Acylation of $-\mathrm{NH}_2$ group of aniline reduces its activity due to resonance of lone pair of nitrogen towards the carbonyl group hence $0-, p^{-}$directive influence of amino group get disturbed.
