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The protonation constants of the Fe(III) complexes and their 1-octanol water partition coefficients. Equilibrium expressions are listed in supplementary section.
| Compound | pKa1 | pKa2 | log P |
|---|---|---|---|
| Fe(TOB)a | 7.1 ± 0.06 | --- | −0.13 |
| Fe(TOLPO) | 6.3±0.02 | --- | −0.32 ± 0.04 |
| Fe2(META) | 7.0±0.24 | 7.7±0.25 | −1.68 ± 0.09 |
| Fe2(PARA) | 6.6±0.06 | 7.9±0.11 | −1.48 ± 0.35 |
| Fe2(DIP) | 6.6±0.08 | 7.8±0.05 | −1.24 ± 0.08 |
From reference 40
