Question

Which of the following will produce \(C_6H_5NC\)?

• A. \(C_6H_5NO_2 \xrightarrow{\text{CHCl}_3/KOH} \)
• B. \(C_6H_5NO_2 \xrightarrow{\text{CHCl}_3/KOH\,(alc)} \)
• C. \(C_6H_5CH_2Cl \xrightarrow{\text{AgCN}} \)
• D. \(C_6H_5CH_2Cl \xrightarrow{\text{KCN}} \)

Answer 1

The Correct Option is C

Concept: Formation of isocyanides (\(-NC\)) occurs via:

• Carbylamine reaction (only with primary amines)
• Reaction with \(AgCN\) (gives isocyanide)

Step 1: Check options

• \(C_6H_5NO_2\) is nitrobenzene, not a primary amine → no carbylamine reaction
• \(KCN\) gives nitrile (\(-CN\)), not isocyanide
• \(AgCN\) gives isocyanide (\(-NC\))

Step 2: Correct reaction \[ C_6H_5CH_2Cl \xrightarrow{AgCN} C_6H_5CH_2NC \] Thus, correct option is \[ \boxed{(3)} \]