Question

'A' and 'B' in the following reactions ($C_6H_5NH_2 \xrightarrow{CHCl_3/KOH} A \xrightarrow{H_2O/H^+} B$) are : 

• A. A
• B. B
• C. C
• D. D

Hint:

Isocyanides hydrolyze to give amines, whereas Cyanides ($R-CN$) hydrolyze to give carboxylic acids. This is a critical distinction in organic synthesis.

Answer 1

The Correct Option is C

Step 1: Aniline + $CHCl_3 + KOH$ is the Carbylamine reaction. It forms Phenyl isocyanide (A), known for its foul smell.
Step 2: Acidic hydrolysis of isocyanides ($R-NC$) yields the primary amine ($R-NH_2$) and formic acid.
Step 3: Therefore, $C_6H_5NC \xrightarrow{H^+} C_6H_5NH_2$.