In the following reaction RCH2COOH -[Br2/p] X -[excess NH3] Y The major amounts of X and Y are

Question

In the following reaction RCH2COOH ->[Br2/p] X ->[excess NH3] Y The major amounts of X and Y are (A)  RCHBrCONH2 ; RCH(NH2 )COOH  (B)  RCHBrCOOH ; RCH(NH2 )COOH  (C)  RCH2COBr ; RCH2COONH4  (D)  RCHBr COOH ; RCH2CONH2

Tardigrade Admin · Accepted Answer

When an acid is heated with Br2 in presence of P, α-H atom of the acid is replaced by bromine atom. This reaction is called Hell-Volhard Zelinsky reaction. NH-2 is a better nucleophile than Br- <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/ef52f80d70c37e3376b4dea54b83ab4c-.png" />

Q. In the following reaction
$RC H_{2} COO H Br X_{2} / p X excess NH X_{3} Y$
The major amounts of $X$ and $Y$ are

$RC H B r CON H_{2}; RC H (N H_{2}) COO H$

$RC H B r COO H; RC H (N H_{2}) COO H$

$RC H_{2} COB r; RC H_{2} COON H_{4}$

$RC H B r COO H; RC H_{2} CON H_{2}$

When an acid is heated with $B r_{2}$ in presence of $P, α - H$ atom of the acid is replaced by bromine atom. This reaction is called Hell-Volhard Zelinsky reaction. $N H_{2}^{-}$ is a better nucleophile than $B r^{-}$

Q. In the following reaction RCH2​COOHBrX2​/p​Xexcess NHX3​​Y The major amounts of X and Y are

RCHBrCONH2​;RCH(NH2​)COOH

RCHBrCOOH;RCH(NH2​)COOH

RCH2​COBr;RCH2​COONH4​

RCHBrCOOH;RCH2​CONH2​