Question

Give one chemical test to distinguish between the following pairs of compounds: Secondary and tertiary amines

Answer 1

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Here is your answer---

Shake the given amines with Hinsberg's reagent ( benzene sulphonyle chloride ) in the presence of an excess f aqueous KOH solution.

A secondary amine form N,N-- dialyl benzene sulphonamide which remanis insoluble in aqueous KOH and even after acidification with dilute HCI.

A teritary amine does not react with benzene sulphonyle chloride and remains insoluble aqueous KOH.

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Answer 2

The Hinesburg’s reagent such as C6H5SO2Cl or benzenesulphonyl chloride is used to differentiate between tertiary and secondary amines.

Here the Hinesburg’s reagent will react with Secondary amines to give out the alkali insolubility whereas the Hinesburg’s reagent will not react at all with the tertiary amines.

You can take the example of N, N – diethylamine.