Question

Which of the following reactions does NOT yield an amine?

पर्याय

• \[\ce{R - CN + H2O ->[H^+]}\]

• \[\ce{R - X + NH3_{(alco)} ->}\]

• \[\ce{R - CH = NOH ->[Na][C2H5OH]}\]

• \[\ce{R - NO2 ->[Sn/conc. HCl]}\]

Answer 1

\[\ce{R - CN + H2O ->[H^+]}\]

Explanation:

\[\begin{array}{cc}
\phantom{.........................}\ce{OH}\phantom{...............}\ce{O}\phantom{...................}\ce{O}\phantom{....}\\
\phantom{...........................}|\phantom{.................}||\phantom{....................}||\phantom{.....}\\
\ce{\underset{Alkyl cyanide}{R - C ≡ N} + H - OH ->[dil. HCl][\Delta] [R - C = NH] -> \underset{Acid amide}{R - C - NH2} ->[H-OH][\Delta] \underset{Carboxylic acid}{R - C - OH} + NH3}
\end{array}\]

\[\ce{(NH3 + HCl -> NH4Cl)}\]

Or the final equation becomes

\[\begin{array}{cc}
\phantom{...................}\ce{O}\\
\phantom{...................}||\\
\ce{\underset{Alkyl cyanide}{R - C ≡ N} + 2H2O + HCl ->[\Delta] \underset{Carboxylic acid}{R - C - OH} + NH4Cl}
\end{array}\]