A) \[C{{H}_{3}}C{{H}_{2}}CH(OH)CHO\]
B) \[C{{H}_{3}}CH(OH)C{{H}_{2}}CHO\]
C) \[C{{H}_{3}}CH(OH)COC{{H}_{2}}\]
D) \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CHO\]
Correct Answer: B
Solution :
Aldol condensation : Aldehydes containing \[\alpha -\]hydrogen undergo self addition in presence of a base to form products called aldols. The reaction is called aldol. condensation. Example: Two molecules of acetaldehyde combine with each other in presence of dil. NaOH to form 3 -hydroxybutanal. \[C{{H}_{3}}CHO+HC{{H}_{2}}CHO\xrightarrow{O{{H}^{-}}}\] \[\underset{3}{\mathop{C{{H}_{3}}}}\,-\underset{\text{hydroxybutanal}}{\mathop{\overset{OH}{\mathop{\overset{|}{\mathop{CH}}\,}}\,-C{{H}_{2}}}}\,-\underset{(aldol)}{\mathop{CHO}}\,\]
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