question_answer

The   formylation  of  certain  aromatic compounds using carbon monoxide and\[HCl\] in presence of cuprous chloride is known as Gattermann-Koch reaction and the product of this reaction is represented as:

A) \[ArCOCl\]                         

B)  \[ArH\]

C) \[ArCHO\]                          

D)  \[ArCuCl\]

Correct Answer: C

Solution :

                Benzene is converted to benzaldehyde by passing a mixture of carbon monoxide and hydrochloric acid gas in the presence of anhydrous\[AlC{{l}_{3}}\]and traces of cuprous chloride.  This reaction is known as Gattermann-Koch reaction \[CO+HCl\xrightarrow{{}}HCOCl\]