Table 3.
1H NMR chemical shifts (δ, ppm) and coupling constants (J, Hz) of HPr+ and its oxidation productsa
| Product | Chemical shifts (ppm) and coupling constants (Hz) | ||||||
|---|---|---|---|---|---|---|---|
|
| |||||||
| H1 | H2 | H4 | H7 | H9 | H10 | H6 | |
|
| |||||||
| HPr+ | 7.29 (J = 8.8) | 6.03 (J = 8.5) | 6.01 | 6.34 (J = 2.3) | 6.47 (J = 8.3, 2.3) | 7.32 (J = 8.3) | 5.34 |
| 2-OH-Pr++ | 8.01 | - | 7.54 | 6.25 (J = 2.3) | 7.52 (J = 9.0, 2.5) | 8.35 (J = 9.3) | - |
| Pr++ | 8.70 (J = 9.3) | 7.36 (J = 9.3, 1.5) | 7.56 (J = 1.5) | 6.26 (J = 2.5) | 7.54 (J = 9.3, 2.3) | 8.64 (J = 9.3) | - |
| Pr++-Pr++ | 8.69 | - | 7.73 (J = 6.5) | 6.34 (J = 2.1) | 7.54 (J = 9.0, 2.1) | 8.70 (J = 9.0) | - |
a
Atom positions are indicated in structures shown in Figure 4.