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Question
Which of the following compounds will undergo self-condensation in the presence of dilute NaOH solution?
Options
C6H5CHO
CH3CH2CHO
(CH3)3C – CHO
H – CHO
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Solution
CH3CH2CHO
Explanation:
Aldehydes and ketones having at least one α-hydrogen undergo a reaction in the presence of dilute alkali as catalyst to form β-hydroxy aldehydes (aldol) or β-hydroxy ketones (ketol), respectively. This is known as Aldol reaction.
Because of the presence of α-hydrogen, CH3CH2CHO undergoes an aldol reaction.
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\phantom{}\ce{O}\\
\phantom{}||\\
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\[\begin{array}{cc}
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\phantom{...............}|\\
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\end{array}\]
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