Table 1. Reduction Potential Values (E_1/2) vs Normal Hydrogen Electrode (NHE) for Metal Complexes Involved in the Fe(III) Transmetalation of [Ti(Def)₂]^2– and [TiO(H⁺–HBED)]⁻ at pH 7.4^a.

compound	E1/2 (V)
[Ti(Def)2]2–	–0.77
[TiO(H+–HBED)]−	–0.60
[Fe(Def)2]3–	–0.59
[Fe(HBED)]−	–0.28
[Fe(Cit)2]5–	–0.38* and 0.16*
[Fe(Cit)(Def)]4–	–0.75*, −0.41*, 0.19*

^a* represents peak potential values of the cathodic peak (Ec) due to a mixture of species.