Which one of the following amides will not un | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Only primary amides $(R-CONH_2)$ undergo the Hoffmann bromamide reaction to yield primary amines.$R-CONH_2 + Br_2 + 4NaOH \xrightarrow{\Delta} R-N

Vedclass · Accepted Answer

$CH_3CONHCH_3$

Vedclass · Answer

(B) Only primary amides $(R-CONH_2)$ undergo the Hoffmann bromamide reaction to yield primary amines.$R-CONH_2 + Br_2 + 4NaOH \xrightarrow{\Delta} R-NH_2 + Na_2CO_3 + 2NaBr + 2H_2O$In the given options,$CH_3CONHCH_3$ is a secondary amide ($N$-methylacetamide) because the nitrogen atom is attached to one alkyl group in addition to the carbonyl group.Since secondary amides lack the two hydrogen atoms on the nitrogen required for the rearrangement mechanism,it does not undergo the Hoffmann bromamide reaction.

Which one of the following amides will not undergo the Hoffmann bromamide reaction?

Similar Questions

Identify $X$ and $Y$ in the following reactions:
$Nitrobenzene \xrightarrow{Zn/NH_4Cl} X$
$Nitrobenzene \xrightarrow{Zn + KOH/C_2H_5OH} Y$

Which of the following compounds is obtained when acetamide is warmed with bromine and excess conc. $KOH_{(aq)}$ solution?

In the diazotisation of aniline with sodium nitrite and hydrochloric acid,an excess of hydrochloric acid is used primarily to

Give the major product of the following reaction $.$

Explain the basicity of aliphatic amines.

Vedclass Test Series

Exam Paper Generator

Online Exam Module