Interpretation:
The rate determining step in nucleophilic
Concept introduction:
In the nucleophile addition step, nucleophile attacked on electrophilic carbon. In this step new bond is formed between carbon and nucleophile
In the nucleophile elimination step, a good leaving group like halogens is removed and the formation of a double bond takes place.
In nucleophilic aromatic substitution reactions that proceed by the nucleophilic addition-elimination mechanism, rate increases as the electronegativity of the halogen leaving group increases:
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