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Chemistry · L5 · SN1 vs SN2 Reaction Pathways

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Decision flowchart for predicting whether nucleophilic substitution proceeds via SN1 (stepwise, carbocation) or SN2 (concerted, backside attack) based on substrate, nucleophile, and solvent.

by @openstemUpdated Chemistry
Nucleophilic substitution?Substrate classSN2: concerted backside attackInversion of configurationRate = k Nu SubSN1: stepwise via carbocationRacemisationRate = k SubNucleophile & solvent?Product: inverted stereochemistryProduct: racemic mixturePrimaryTertiarySecondaryStrong Nu, polar aproticWeak Nu, polar protic

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