Table 2. E(2) values corresponding to the magnitude of donor–acceptor interactions involving σ* orbitals of C–O and C–N bonds (kcal mol–1; interactions involving all donors are summed).
| Entry |
|
|
Predicted kinetic product(s) |
| 1 | 80.9 | 16.5 | A |
| 2 | 16.8 | 430.3 | B |
| 4 | 21.6 | 29.8 | A & B |