1. How does an SN1 reaction differ from an SN2 reaction? Explain in terms of the substrate, nucleophile, and mechanistic steps.
2. Explain the stereochemistry of the SN2 attack.
3. What substrates react faster in SN2 reactions, tertiary or primary? Why?
4. Identify the substrate and nucleophile in the reactions below, then draw the mechanism and products for each reaction: