Among the following,which one is not formed i | vedclass

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

Question

(D) The Hoffmann bromamide degradation reaction involves the conversion of an amide $(RCONH_2)$ to a primary amine $(RNH_2)$ using $Br_2$ and $KOH$ (o

Vedclass · Accepted Answer

$RNC$

Vedclass · Answer

(D) The Hoffmann bromamide degradation reaction involves the conversion of an amide $(RCONH_2)$ to a primary amine $(RNH_2)$ using $Br_2$ and $KOH$ (or $NaOH$).The mechanism proceeds through the following intermediates:$1$. Formation of $N$-bromamide: $RCONH_2 + Br_2 + KOH \rightarrow RCONHBr + KBr + H_2O$.$2$. Formation of an isocyanate intermediate: $RCONHBr + KOH \rightarrow RNCO + KBr + H_2O$.$3$. Hydrolysis of isocyanate to amine: $RNCO + 2KOH \rightarrow RNH_2 + K_2CO_3$.Among the given options,$RNC$ (isocyanide) is not formed during this reaction. $RNCO$ (isocyanate) is an intermediate,$RCONHBr$ is an intermediate,and $RNH_2$ is the final product.

Among the following,which one is not formed in the Hoffmann bromamide degradation reaction?

Similar Questions

Write structures of different isomers corresponding to the molecular formula $C_{3}H_{9}N$. Write $IUPAC$ names of the isomers which will liberate nitrogen gas on treatment with nitrous acid.

The relation between $(A)$ and $(B)$ is:
$CH_3-CONH_2 \xrightarrow{KOBr} (A)$
$CH_3-CONH_2 \xrightarrow{LiAlH_4} (B)$

The correct statement about the given chemical reaction is:

Consider the following reaction sequence. The final product $D$ will be:
$C_6H_5CH_3$ $\xrightarrow[\Delta]{KMnO_4/H^+} A$ $\xrightarrow{SOCl_2} B$ $\xrightarrow[\Delta]{NH_3} C$ $\xrightarrow{KOH/Br_2} D$

Which of the following products is $NOT$ obtained when nitrobenzene is reduced in an alkaline medium?

Vedclass Test Series

Exam Paper Generator

Online Exam Module