Which of the following amines will form a product that is soluble in KOH, on reaction with Hinsberg’s reagent?

Isopropylamine

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Diethylamine

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N,N-Dimethylpropylamine

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N,N-Dimethylaniline

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Solution

The correct option is A Isopropylamine

The reaction of Hinsberg’s reagent with Isopropylamine gives N-isopropylbenzene sulphonamide. The lone hydrogen attached to the N atom is strongly acidic due to the presence of strong electron withdrawing sulphonyl group. Hence, is it soluble in alkali like KOH.

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Which of the following is reacts with Hinsberg’s reagent to form the product which is soluble in KOH?

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