Hinsberg reagent is benzenesulfonyl chloride. In aqueous KOH this reacts with primary amine ( RNH2 ) to give a clear solution which on acidification gives a white precipitate, which is due to the formation of

Question

Hinsberg reagent is benzenesulfonyl chloride. In aqueous KOH this reacts with primary amine ( RNH2 ) to give a clear solution which on acidification gives a white precipitate, which is due to the formation of (A) R-NHSO2C6H5 (B) C6H5SO2NH2 (C) R-N-SO2C6H5K+ (D) R- overset+NH2SO2C6H5OH-

Tardigrade Admin · Accepted Answer

The primary amines initially form sulfonamide which deprotonated by base giving water soluble salt.

C_{6} H_{5} S O_{2} Cl + RN H_{2} \to RN H S O_{2} C_{6} H_{5}

RN H S O_{2} C_{6} H_{5} K O H R N ⊖ S O_{2} C_{6} H_{5} K^{\oplus}

R N ⊖ S O_{2} C_{6} H_{5} K^{\oplus} Acidification RN H S O_{2} C_{6} H_{5}

Q. Hinsberg reagent is benzenesulfonyl chloride. In aqueous $K O H$ this reacts with primary amine ( $RN H_{2}$ ) to give a clear solution which on acidification gives a white precipitate, which is due to the formation of

$R - N H S O_{2} C_{6} H_{5}$

$C_{6} H_{5} S O_{2} N H_{2}$

$R - N^{-} S O_{2} C_{6} H_{5} K^{+}$

$R - N + H_{2} S O_{2} C_{6} H_{5} O H^{-}$

Q. Hinsberg reagent is benzenesulfonyl chloride. In aqueous KOH this reacts with primary amine ( RNH2​ ) to give a clear solution which on acidification gives a white precipitate, which is due to the formation of

R−NHSO2​C6​H5​

C6​H5​SO2​NH2​

R−N−SO2​C6​H5​K+

R−N+H2​SO2​C6​H5​OH−

The primary amines initially form sulfonamide which deprotonated by base giving water soluble salt. C6​H5​SO2​Cl+RNH2​→RNHSO2​C6​H5​ RNHSO2​C6​H5​KOH​RN⊖SO2​C6​H5​K⊕ RN⊖SO2​C6​H5​K⊕Acidification​RNHSO2​C6​H5​

Q. Hinsberg reagent is benzenesulfonyl chloride. In aqueous $K O H$ this reacts with primary amine ( $RN H_{2}$ ) to give a clear solution which on acidification gives a white precipitate, which is due to the formation of

$R - N H S O_{2} C_{6} H_{5}$

$C_{6} H_{5} S O_{2} N H_{2}$

$R - N^{-} S O_{2} C_{6} H_{5} K^{+}$

$R - N + H_{2} S O_{2} C_{6} H_{5} O H^{-}$