MCQ
Aldol condensation will not be observed in
  • chloral
  • B
    phenylacetaldehyde
  • C
    hexanal
  • D
    nitromethane

Answer

Correct option: A.
chloral
a
only those compounds which have $\alpha -H$ give aldol condensation

  $(a)$ $\underset{(no\,\,\alpha -H)}{\mathop{\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,O  \\
   \,\,\,\,\,\,\,\,\,\,\,||  \\
   C{{l}_{3}}\overset{\alpha }{\mathop{C}}\,CH  \\
\end{matrix}}}\,$     $(b)$ $\underset{(\alpha -H)}{\mathop{{{C}_{6}}{{H}_{5}}\overset{\alpha }{\mathop{C}}\,{{H}_{2}}CHO}}\,$

$(c)$ $\underset{(\alpha -H)}{\mathop{{{C}_{4}}{{H}_{9}}\overset{\alpha }{\mathop{C}}\,{{H}_{2}}CHO}}\,$       $(d)$  $CH_3NO_2$

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