| Compound | Epa (mV)a | Epc (mV) | Assignment |
| L | 0.54 | --- | L 0/+ |
| 1.42 | --- | L +/- | |
| Cu-L | 0.48 | CuII/CuIII | |
| Cu-L | 0.21 | CuIII/CuII | |
| Cu-L | 1.01 | Lcoord +/- |