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What are nucleophilic substitution reactions?
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A nucleophilic substitution reaction is a chemical reaction where an electron-rich molecule (nucleophile) attacks a positively charged atom in another molecule, replacing a previously attached group called a "leaving group" and essentially substituting itself in its place.
Explanation: Nucleophilic substitution reactions are a fundamental type of organic reaction where a nucleophile displaces a leaving group, resulting in the formation of a new bond.