Question

Which among the following aldehydes is most reactive towards nucleophilic addition reactions?

• A.

  

• B.

  

• C.

  

• D.

  

Answer 1

The Correct Option is A

Formaldehyde (HCHO) is the most reactive towards nucleophilic addition reactions because:
• It has no alkyl groups attached to the carbonyl carbon, leading to the lowest steric hindrance at the carbonyl carbon.
• The partial positive charge on the carbonyl carbon is highest due to the absence of electron-donating groups (alkyl groups), making it highly electrophilic.
Thus, HCHO is the most reactive aldehyde for nucleophilic addition reactions.