This is the case when aldehydes and ketone are not reactive towards nucleophilic substitution as carboxylic aci acyl chlorides are ...plz expian the reason .

plz explain from pictures which I have sent u and acid anhydrides), but are more reactive than carbonyl compounds in which Yis a relatively strong base (carboxylic acids, es- ters, and amides). A molecular orbitalexplanation of why resonance electron donation decreases the reactivity of the carbonyl group is given in Section 17.15.