Table 1.
Redox potentials of Co and Ni complexes (V vs. Fc+/0) determined from cyclic voltammetry measurements (100 mV·s−1) in CH3CN at a GC electrode in the presence of nBu4NBF4 (0.1 mol·L−1)
| Complexe | E1/2 (MIII/MII) | E1/2 (MII/MI) |
|---|---|---|
| [Co(DO)(DOH)pnBr2] | −0.57 | −1.11 |
| [Co(MO)(MOH)pnCl2] | −0.65 | −0.96 |
| [Co((DO)2BF2)pnBr2] | −0.38 | −0.84 |
| [Co(dmgBF2)2(CH3CN)2] (4)* | −0.2 (irrev. cathodic) | −0.93 |
| [Co(dmgH)2pyCl] | −1.05 (irrev. anodic) | −1.48 |
| [Co(dmgH)2(OH2)2] | — | −1.48 |
| [Ni(DO)(DOH)pn](ClO4) | — | −1.22 |
| [Ni((DO)2BF2)pn](ClO4) | — | −0.97 |
| [Ni(MO)(MOH)pnCl] | — | −1.04 |
| [Co(DO)(DOH)pn(PPh3)] | −0.52 | −0.82 |
| [Co(DO)(DOH)pnBr(PPh3)] | −0.18 | −0.94 |
*These values have been checked in the present study for correct reference toward the Fc+/0 couple.