Table 2.
Selected 1H and 13C chemical shifts of the vinyl group of the ligands 1–4 and the corresponding complexes 1a–4a 1.
| Compound | 1H NMR | 13C NMR | ||||||
|---|---|---|---|---|---|---|---|---|
| –CH=CH2 | Δδ | –CH=CH2 | Δδ | –CH=CH2 | Δδ | –CH=CH2 | Δδ | |
| 1 | 6.06 | 1.06 | 5.42/5.28 | 1.08/0.97 | 133.43 | 55.87 | 118.65 | 53.55 |
| 1a | 5.00 | 4.34/4.31 | 77.56 | 65.10 | ||||
| 2 | 5.90 | 0.88 | 5.18/5.08 | 0.93/0.83 | 135.26 | 51.08 | 117.59 | 51.63 |
| 2a | 5.02 | 4.25 | 84.18 | 65.96 | ||||
| 3 | 5.88 | 0.88 | 5.08/4.99 | 0.91/0.82 | 138.59 | 49.68 | 115.59 | 50.54 |
| 3a | 5.00 | 4.17 | 88.91 | 65.05 | ||||
| 4 | 5.84 | 0.87 | 5.04/4.95 | 0.89/0.80 | 139.33 | 49.73 | 115.18 | 50.34 |
| 4a | 4.97 | 4.15 | 89.60 | 64.84 | ||||
1 Spectra measured in Acetone-d6. Chemical shifts (δ) are given in ppm.