Which mechanism SN1, SN2, E1, E2? Strong bulky bases (primary and secondary) E2 favored over SN2. Small strong bases/nucleophiles (primary and secondary) SN2 and E2. Small strong bases/nucleophiles (tertiary) - E2. Weak bulky bases – E1 over SN1. Weak bases/nucleophiles (secondary and tertiary alkyl halides) – E1 and SN1. Weak bases/nucleophiles (primary alkyl halides) – E1
Choose which mechanism(s)