Question

A primary amine is formed by an amide on treatment with bromine and alkali. The primary amine has

Options

• 1 carbon atom less than amide

• 1 carbon atom more than amide

• 1 hydrogen atom less than amide

• 1 hydrogen atom more than amide

Answer 1

1 carbon atom less than amide

Explanation:

The reaction is Hoffmann bromamide reaction

\[\begin{array}{cc}
\ce{O}\phantom{.............................................................}\\
||\phantom{.............................................................}\\
\ce{R - C - NH2 + Br2 + 4NaOH -> R - NH2 + 2NaBr + Na2CO3 + 2H2O}
\end{array}\]

R – NH₂ contains one carbon less than

\[\begin{array}{cc}
\ce{O}\phantom{...}\\
||\phantom{...}\\
\ce{R - C - NH2}
\end{array}\]