| Substituent | Position of Reaction |
log(rate relative to H) |
|---|---|---|
| NR2 | o, p | 1.3 |
| OH, OR | o, p | 0.9 |
| R | o, p | 0.3 |
| Ar | o, p | 0.2 |
| F | o, p | 0.1 |
| H | "o, p" | 0 |
| NHCOR | o, p | -0.1 |
| Cl, Br, I | o, p | -0.1 |
| CO2H | m | -0.4 |
| COR, CO2R | m | -0.5 |
| CX3 | m | -0.5 |
| SO3H | m | -0.6 |
| CN | m | -0.7 |
| NO2 | m | -0.8 |
| NR3+ | m | -0.9 |