Mention the catalyst and reaction condition in the given rea... | Chemistry | SolveeIt

Question

Mention the catalyst and reaction condition in the given reaction

$X_2$ /grey phosphorus, $H_2O$

$X_2$ /red phosphorus, $H_2O$

$X_2$ /white phosphorus, $H_2O$

$X_2$ /blue phosphorus, $H_2O$

Answer

$X_2$ /red phosphorus, $H_2O$

Explanation

Solution

The given reaction is Hell-Volhard Zelinsky (H.V.Z.) reaction. In this reaction, carboxylic acids (except formic acid) react with chlorine or bromine in presence of small quantities of red phosphorus to give $\alpha$ -chloro or $\alpha$ -bromo acids.
$R - CH_2 - COOH {->[(i) X_2, \text{red} P][(ii) H_2O]}$
$\underset{\alpha \text{- halo carboxylic acid}}{R - CH - \underset{\overset{|}{X}}{C}OOH }\,\,\,$ $[X = Cl, Br]$

Chemistry Question on Aldehydes, Ketones and Carboxylic Acids

Solution