Is nucleophile substitution reaction and nucleophilic addition elimination reactions are meant same(In both the reactions a strong nucleophile is substituted instead of a weak nucleophile in a compound ).What is the difference between these two reactions?
Nucleophilic substitution reaction is a reaction in which a Sp3 hybridised carbon atom has a good leaving group so that a strong nucleophile can replace it.
Nucleophilic addition reaction is a reaction in which
a nucleophile attack to the electron dificient bond like double bond to make two single bonds.
The product is different.
Nucleophilic Substitution gives the product on same hybridization
Nucleophilic Elimination gives the product with different hybridization by breaking a sigma bond and forming another (pi)-bond.
That mean in elimination if the reactant is of sp3 hybridization it will now give a sp2 hybridized product. If it is sp2 hybridized reactant it will give a sp hybridized product. But,
Substitution will give sp3 product for sp3 reactant, sp2 product for sp2 reactant and so on.