Table 1.
13C chemical shift of C7 and C8
 | |||
|---|---|---|---|
| Substrate | Substituent X | δ | |
| C7 | C8 | ||
| Alkyne | None | 87.5 | 74.5 |
| Alkene | I | 85.3 | 87.5 |
| Alkene | Br | 113.8 | 82.4 |
| Alkene | Cl | 114.2 | 80.6 |
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