Question

Complete the following reaction:-
${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Br}+\mathrm{KCN}\to$

Answer 1

• When Alkyl bromides in the form of $\mathrm{R}-\mathrm{X}$, where R is the Alkyl group and X is the halogen group, react in the presence of $\mathrm{KCN}$ (Potassium cyanide), then alkyl cyanides $\mathrm{R}-\mathrm{CN}$ are produced as the main product and potassium halide, $\mathrm{K}-\mathrm{X}$ is produced as the by-product.
• When Ethyl bromide reacts with Potassium cyanide, Ethyl cyanide and Potassium bromide are formed.
• $\underset{\mathrm{Ethyl}\mathrm{bromide}}{{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Br}}+\underset{\mathrm{Potassium}\mathrm{cyanide}}{\mathrm{KCN}}\to \underset{\mathrm{Ethyl}\mathrm{cyanide}}{{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CN}}+\underset{\mathrm{Potassium}\mathrm{bromide}}{\mathrm{KBr}}$