Question

$C{H}_{3}Br\stackrel{KCN}{\to }A\underset{LiAl{H}_4}{\overset{4\left[H\right]}{\to }}C{H}_{3}C{H}_{2}N{H}_2$
IUPAC name of $\text{A}$ is:

• A. Methyl cyanide
• B. Methyl isonitrile
• C. Acetonitrile
• D. Ethane nitrile

Answer 1

Answer: (D)

$C{H}_{3}Br\stackrel{KCN}{\to }\underset{\text{Ethane nitrile}}{C{H}_{3}CN}\underset{LiAl{H}_4}{\overset{4\left[H\right]}{\to }}\underset{\text{Ethylamine}}{C{H}_{3}C{H}_{2}N{H}_2}$
IUPAC name of compound A (acetonitrile) is Ethane nitrile.
Methyl bromide reacts with pottasium cyanide to produce acetonitrile which on reduction with Lithium aluminium hydride (LAH) produces primary amine (Propan-1-amine).
Alkyl halides are characterised by nucleophilic substitution reaction followed by reduction reaction.