MCQ
Which one does not give cannizzaro's reaction
- ABenzaldehyde
- ✓$2-$methyl propanal
- C$p-$methoxy benzaldehyde
- D$2,2$ dimethyl propanal
✓
Answer
Correct option: B.
$2-$methyl propanal
b
(b) Aldehyde, which does not have the $\alpha - H$ atom, gives cannizzaro's reaction on heating with conc. alkali solution $(50\%)$
(b) Aldehyde, which does not have the $\alpha - H$ atom, gives cannizzaro's reaction on heating with conc. alkali solution $(50\%)$
$\mathop {{C_6}{H_5}CHO}\limits_{\alpha - H{\text{ atom absent}}} $
$\mathop {\begin{array}{*{20}{c}}
{\,\,\,\,\,C{H_3}} \\
{\alpha |\,\,\,\,\,\,} \\
{C{H_3} - CHCHO}
\end{array}}\limits_{\alpha \, - \,H\, - \,atom} $
$\mathop {\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
\,\,\,\,\,{C{H_3}} \\
\,\,\,\,\,{|\,\,\,\,\,\,\,}
\end{array}} \\
{C{H_3} - C - CHO} \\
\,\,\,\,{|\,\,\,\,\,\,\,} \\
\,\,\,\, \,\, {C{H_3}\,\,}
\end{array}}\limits_{\alpha - H{\text{ - atom absent}}} $
$\mathop {HCHO}\limits_{\alpha - H - {\text{atom absent}}} $
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