For example, Fe3+ in octahedral sites of ZnFe2O4 normal spinel have unpaired electrons aligned anti-parallel to each other by the superexchange force. In contrast, Fe3+ in octahedral sites of NiFe2O4 inverse spinel are parallel to each other, and anti-parallel to Fe3+ in tetrahedral sites.

1. Does the energy level of unpaired electrons differ between magnetically coupled and uncoupled states? Assume the same ion and same coordination.

Redox potential is related to the energy level of the electron being taken or given to the metal ion orbital.

2. Could we expect the redox potential of metal ions to differ due to a difference in magnetic coupling? I understand that redox potential can also be affected by other changes to local environment such as changing lattice parameters, induction effect, etc, so I am just asking if magnetic coupling could contribute to different redox potential, not solely responsible for it.

I appreciate your responses and any related literature recommended.