Table 6. First oxidation potentials (EO1, V vs. Fc+/0) of group 8 metal carbene complexes supported by the TPFPP macrocycle.
| Complex | E O1 a (V) | Ref. b |
| Fe-mono(carbene) complexes | ||
| [Fe(TPFPP)(Ad)] (1a) | 0.01 | TW |
| [Fe(TPFPP)(CPh2)] | 0.35 | 17g |
| Ru-mono(carbene) complexes | ||
| [Ru(TPFPP)(Ad)] (2a) | 0.18 | TW |
| [Ru(TPFPP)(CPh2)] | 0.46 | 17g |
| [Ru(TPFPP)(C(Ph)CO2Me)(MeOH)] | 0.65 | 17g |
| Os-bis(carbene) complexes | ||
| [Os(TPFPP)(Ad)2] (3b) | 0.04 c | TW |
| [Os(TPFPP)(CPh2)2] | 0.30 | TW |
a E 1/2 values of reversible oxidation processes.
bTW = this work.
cQuasi-reversible.