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Mechanism Checker — SN1/SN2/E1/E2 Practice
Practice predicting SN1, SN2, E1, and E2 pathways for real substrate and reagent combinations, then check your answer against a rules-based engine that reasons through substrate class, nucleophilicity, basicity, steric bulk, solvent, and temperature.
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WORKED EXAMPLES
Which mechanism dominates for tert-Butyl bromide + H₂O?
SN1. SN1 dominates, with E1 as the minor product.
Which mechanism dominates for Methyl bromide + NaOH(aq)?
SN2. Methyl substrates can only undergo SN2 — elimination is structurally impossible (no β-hydrogen) and SN1/E1 are impossible (no stable methyl cation), regardless of reagent or conditions.
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