Question

How are reaction between aldehydes and nucleophiles fundamentally different than reaction between acyl chloride and nucleophiles?

• A. Aldehydes are readily oxidized by nucleophiles to carboxylic acids.
• B. Acyl chloride have a leaving group, $C{l}^{-}$ whereas aldehyde do not.
• C. Aldehydes do not form tetrahedral intermediates with nucleophiles.
• D. Acyl chlorides readily form enol tautomers.

Answer 1

The correct option is B Acyl chloride have a leaving group, $C{l}^{-}$ whereas aldehyde do not.

$C{l}^{-}$ is a good leaving group hence acyl chloride undergo nucleophilic substitution reaction but in absence of any leaving group, aldehydes undergo nucleophilic addition reaction .