Table 3. Marcus parameters of the four complexes.
| Complex | H ab 4/λ | H ab (cm–1) | ΔG0 a (cm–1) | λ (cm–1) | ΔG0 b (cm–1) |
| [Fe(bpy)3](PF6)2 | 1/(30 ± 5) | 4.4 ± 0.2 | –7300 ± 730 | 11 000 ± 1000 | –7300 ± 730 |
| [Fe(dmb)3](PF6)2 | 1/(33 ± 4) | 4.2 ± 0.1 | –6000 ± 600 | 9700 ± 900 | –7100 ± 710 |
| [Fe(dtbb)3](PF6)2 | 1/(29 ± 4) | 4.3 ± 0.2 | –6100 ± 610 | 9500 ± 900 | –7300 ± 490 |
| [Fe(terpy)2](PF6)2 | 1/(14 ± 9) | 6.2 ± 1.2 | –7600 ± 760 | 14 100 ± 1200 | –5200 ± 480 |
aCalculated from the Fe(ii/iii) oxidation potentials (ΔEox) and eqn (5).
bCalculated assuming a value for λ of 11 000 ± 1000 cm–1 for all four complexes.