Which of the following amines will not react with Hinsberg's reagent?

(C H_{3})_{2} N H

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(C H_{3})_{3} N

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C H_{3} N H_{2}

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C_{6} H_{5} N H_{2}

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Solution

The correct option is B $(C H_{3})_{3} N$
Only $1^{\circ}$ and $2^{\circ}$ amines react with Hinsberg’s reagent (benzene sulphonyl chloride) due to presence of acidic $H -$ atom where as $3^{\circ}$ amines do not react with Hinsberg’s reagent as they do not contain any acidic $H -$ atom.

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