Question

Hinsbergs reagent is used to distinguish between:

• A. $1^{\circ}$ and $2^{\circ}$ amines
• B. $2^{\circ}$ and $3^{\circ}$ amines
• C. (a) & (b)
• D. none of these

Answer 1

Answer: (C)

(a) & (b)

Answer 2

Hinsberg's reagent (benzene sulphonyl chloride) is used to distinguish between $1^{\circ}, 2^{\circ}$ and $3^{\circ}$ amines. $1^{\circ}$ amines $+$ H.R. ${->[{ NaOH }][{ H _{2} O }]}$ colourless solution ${->[{\text { acidified }}]}$ insoluble $2^{\circ}$ amines $+$ H.R. ${->[{ NaOH }][{ H _{2} O }]}$ insoluble ${->[{\text{acidified}}]}$ insoluble $3^{\circ}$ amines + H.R. ${->[{ NaOH }][{ H _{2} O }]}$ insoluble ${->[{\text{acidified}}]}$ colourless solution