નીચેનામાંથી કઈ હોફમેન બ્રોમાઈડ પ્રકિયા આપતું નથી ?

Question

A$\begin{matrix} O \\ || \\ C{{H}_{3}}-C-N{{H}_{2}} \\ \end{matrix}$
B$\begin{matrix} O\, \\ ||\,\, \\ Ph-C-N{{H}_{2}} \\ \end{matrix}$
C$\begin{matrix} O\,\,\,\,\,\,\,\, \\ ||\,\,\,\,\,\,\,\,\,\, \\ C{{H}_{3}}-C-NH-Br \\ \end{matrix}$
D$\begin{matrix} O\,\,\,\,\,\,\,\,\,\,\, \\ ||\,\,\,\,\,\,\,\,\,\,\,\,\, \\ Ph-C-NH-Ph \\ \end{matrix}$

Diffcult

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Solution

d
$(d)$ $\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\, \\
Ph-C-NH-Ph \\
\end{matrix}$

$N-$ substituted amide will not undergo Hoffmann bromamide reaction because formation of iso- cyanate is not possible.

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