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Factors affecting rate of SN2

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The are several factors that affect the reaction rate of SN2: Nucleophilicity (strength of nucleophile ) Substrate (the guy being attacked by the nucleophile ) while there are 2 factors affecting the nucleophilicity   i . steric hindrance ii . solvent effect   and 2 factors affecting the substrate   i . leaving group ii . steric hindrance So actually there are 4 factors affecting the reaction rate of SN2. Let's go over it one by one. Nucleophilicity Nucleophile is a guy who loves nucleus as he has extra electrons around him. So generally, a nucleophile is negatively charged and the more negatively charge, the better nucleophile it is. We can then make a generalization that a conjugate base is a better nucleophile than its conjugate acid . For example, an ethoxide ion is more nucleophilic than its conjugate acid, ethanol.  Common Pitfall: it is tempting to say that the ethoxide ion is more nucleophilic because it is more basic. W...