Table 2.
Stability and protonation constants (logK) of FeIII and GaIII-complexes formed with TRAP6−, NOTA3−, and Bha− ligand (25°C).
| TRAP6− | NOTA3− | Bha− | ||||
|---|---|---|---|---|---|---|
| FeIII | GaIII | FeIII | GaIII | FeIII | ||
| I | 0.15 M NaNO3 | 0.1 M Me4NCla | 0.1 M KClb | 0.1 M Me4NClc | 0.15 M NaNO3 | 0.2 M KCld |
| ML | 26.73(8) | 26.24 | 28.3 | 29.60 | 10.80(2) | 11.08 |
| MHL | 5.07(2) | 5.18 | – | 0.9 | – | – |
| MH2L | 4.34(2) | 4.55 | – | – | – | – |
| MH3L | 3.20(2) | 3.77 | – | – | – | – |
| MH4L | – | 0.7 | – | – | – | – |
| M(L)OH | 9.76(2) | 9.84 | 9.12(4)e | 9.83 | – | – |
| ML2 | – | – | – | – | 9.03(2) | 10.12 |
| ML3 | – | – | – | – | 7.41(3) | 7.60 |
| logβFeL2(OH)2 | – | – | – | – | 6.68(5) | – |