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9. Amines — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry9. Amines1 Mark
MCQ
Product of this Hoffmann bromamide reaction is
  • A
    $\begin{matrix}
       O\,\,  \\
       ||\,\,  \\
       Ph-C-C{{H}_{3}}  \\
    \end{matrix}$
  • ✓
    $Ph-CHO$
  • C

  • D
    $Ph-CH_2 -NH_2$
✓

Answer

Correct option: B.
$Ph-CHO$
b
$(b)$ $\underset{(Hoffmann\,bromamide\,reaction)}{\mathop{\begin{matrix}
   OH\,\,\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   Ph-CH-C-N{{H}_{2}}\xrightarrow[KOH]{B{{r}_{2}}}  \\
\end{matrix}}}\,\underset{(unstable)}{\mathop{\begin{matrix}
   OH\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   Ph-CH-N{{H}_{2}}\to   \\
\end{matrix}}}\,\begin{matrix}
   O  \\
   ||  \\
   Ph-C-H  \\
\end{matrix}$

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