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Question
Which will undergo faster nucleophilic addition reaction?
Acetaldehyde or Propanone
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Solution
Aldehydes are generally more reactive than ketones in nucleophilic addition reactions due to steric hindrance. As the electron density at the carbonyl carbon increases, the +I effect increases, which decreases the chances of attack by a nucleophile. Thus, acetaldehyde is more reactive than propanone.
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