SN1 vs SN1/E1 competition (same carbocation hub) (First step identical for SN1 and E1; product split controlled by nucleophile/base)
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First step identical for SN1 and E1; product split controlled by nucleophile/base identity, concentration, temperature
What each symbol means
| Symbol | What it stands for |
|---|---|
| B⁻ | Base |
| R⁺ | Carbocation intermediate |
| Nu⁻ | Nucleophile |
When to use this
Polar protic; tertiary/benzylic substrates; higher T favors elimination; strong small nucleophile favors substitution.