Table 1.
X = | effect | τM (µs) | Δω (ppm) | 1– (MS/M0) |
---|---|---|---|---|
Mesomeric | ||||
CO2tBu | −M | 352 ± 17 | 47.69 | 0.415 |
CN | −M | 324 ± 33 | 47.61 | 0.477 |
H | 0 | 269 ± 32 | 46.72 | 0.611 |
OMe | +M | 198 ± 19 | 47.25 | 0.194 |
Inductive | ||||
F | −I | 144 ± 8 | 44.98 | 0.347 |
H | 0 | 269 ± 32 | 46.72 | 0.611 |
Me | +I | 310 ± 55 | 46.89 | 0.113 |