Chemistry - Halogen Derivative Question with Solution | TestHub

$\text{AgCN}$ is predominantly a covalent compound. The bond between $\text{Ag}$ and $\text{C}$ is covalent, which leaves the lone pair of electrons on the nitrogen atom available for nucleophilic attack.

When an alkyl halide such as ${\text{CH}}_3{\text{CH}}_2\text{Br}$ reacts with alcoholic $\text{AgCN}$, the nucleophilic attack occurs through the nitrogen atom rather than the carbon atom.

This results in the formation of an alkyl isocyanide as the major product.

${\text{CH}}_3{\text{CH}}_2\text{Br}+{\text{AgCN}}_{(alc)}\to {\text{CH}}_3{\text{CH}}_2\text{NC}+\text{AgBr}$

The product P is ethyl isocyanide, ${\text{CH}}_3{\text{CH}}_2\text{NC}$.