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Question
Which of the following compounds do not undergo aldol condenstion?
Which of the following compounds do not undergo aldol condenstion?
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Solution
The correct option is D
Aldol condensation
The aldehydes and ketones having at least two alpha hydrogens a−H undergo aldol candensation.
Base catalysed aldol reaction:
Base catalysed Dehydation:
Analysing the options
Option (A)
Ethanal has three alpha hydrogens and thus will undergo aldol condensation.
Option (B)
In the compound ,no alpha hydrogen is present. Therefore, it will not undrego aldol condensation.
Option (C)
Acetone has six alpha hydrogens and thus will undergo condensation.
Option (D)
In this compound, no alpha hydrogen is present. Therefore, it will not undergo aldol condensation.
Hence, option B and D are the correct answers.
Aldol condensation
The aldehydes and ketones having at least two alpha hydrogens a−H undergo aldol candensation.
Base catalysed aldol reaction:
Base catalysed Dehydation:
Analysing the options
Option (A)
Ethanal has three alpha hydrogens and thus will undergo aldol condensation.
Option (B)
In the compound ,no alpha hydrogen is present. Therefore, it will not undrego aldol condensation.
Option (C)
Acetone has six alpha hydrogens and thus will undergo condensation.
Option (D)
In this compound, no alpha hydrogen is present. Therefore, it will not undergo aldol condensation.
Hence, option B and D are the correct answers.
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