Question

Which among the following react with Hinsberg's reagent?

Choose the correct answer from the options given below:

• A. B and D only
• B. C and D only
• C. A, B and E only
• D. A, C and E only

Hint:

Hinsberg's reagent is a useful test for distinguishing primary and secondary amines from tertiary amines, as tertiary amines do not react due to the absence of a replaceable hydrogen atom on nitrogen.

Answer 1

The Correct Option is D

Hinsberg's reagent (benzene sulfonyl chloride) reacts with primary and secondary amines to form soluble sulfonamide salts but does not react with tertiary amines as they do not have a replaceable hydrogen atom on the nitrogen.
A (Aniline) reacts with Hinsberg's reagent because it is a primary amine.
C (Methylamine) reacts with Hinsberg's reagent because it is also a primary amine.
E (Aniline derivative) reacts because it is a primary amine.
B (Diphenylamine) and D (Trimethylamine) do not react with Hinsberg's reagent because they are secondary and tertiary amines, respectively, and do not have a hydrogen atom on nitrogen that can be replaced by the reagent.
Thus, the correct answer is A, C, and E only. \bigskip % Choose the correct answer from the options given below: (1) B and D only 
(2) C and D only 
(3) A, B and E only 
(4) A, C and E only