Question

In case of aldehydes and ketones there is the addition of nucleophile but in case of acyl compound, there is a nucleophilic substitution.

• A. True
• B. False

Answer 1

The correct option is A True

In both aldehydes and ketones, $C$- atom is double bonded with oxygen atom. Since electronegativity of $0$- atom is more than that of the $C$- atom, it pulls the shared pair of electron move towards itself. Due to which $C$- atom acquires partial $+ve$ change and $0$ atom acquires partial partial $+ve$ charge. Hence, nucleophile can easily attack on the $C$- atom to neutralize the $+ve$ charge and makes it stable. Pie-bond is being converted into a single bond ($\partial$), due to which it becomes more stable. In caes of acyl substitution involving nucleophiles and acyl substitution compound. The nucleophiles displace the leaving group of acyl derivatives. Nucleophilic addition does not occur in acyl compound because nucleophile addition to an electrodeficient, double or triple bond, a $n$ bond reacts with electron rich reactant. So, above statement is true.