Question

Primary and secondary amines cannot be distinguished by
(a) Schiff’s reagent
(b) Carbylamine reaction
(c) Hoffmann’s bromamide reaction
(d) Iodoform test

Answer 1

Answer:

Primary and secondary amines cannot be distinguished by:- Hoffmann’s bromamide reaction.

Answer 2

Answer:

Correct option is: (c)

Hoffmann’s bromamide reaction

Primary and secondary amines cannot be distinguished by Hoffmann’s bromamide reaction.

Explanation:

Primary Amines: Primary amines are nitrogen-containing compounds with one alkyl or aryl group attached.

Secondary Amines: Secondary amines are nitrogen-containing amines with two alkyl or aryl groups attached. An amide degrades when it is exposed to bromine in a sodium hydroxide solution that is either aqueous or ethanolic, resulting in the production of primary amine. Hoffmann bromamide degradation reaction is the common name for this amide-degrading reaction. Thus, one less carbon is present in the primary amine than there were in the amide.

Hoffmann's bromamide reaction is provided by the amides used to make the primary amines, not by the primary amines themselves. Compared to secondary amines, primary amines are more basic.

RCONH$_{2}$ +Br$_{2}$ + 4NaOH

R-NH$_{2}$ + Na$_{2}$CO$_{3}$ + 2NaBr + 2H$_{2}$O