Table 2. Equilibrium constants of the Re complexes.
| Complex |
K 1/10–3 | K 2/103 M–1 | K 3/M–1 | |
| Metal | X | |||
| Re(i) | H | 71 ± 1 | 1.2 ± 0.2 | 88 ± 13 |
| Br | 128 ± 8 | 1.4 ± 0.1 | 179 ± 21 | |
| MeO | 30 ± 2 | 2.6 ± 0.1 | 79 ± 10 | |
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