Table 2.

Redox properties of iron(IV) complexes of L

Complex	Reduction potential, mV (vs. Fc+/0)*	kobs (DHA)†, s−1	KIE
1b	270 < E < 490	4.0 × 10−5	9
2b	760	5.1 × 10−4	10
4b	490 < E < 670	4.2 × 10−2	27

*The reduction potentials of 1b and 4b were estimated by titrations with reductants with known potentials, such as acetylferrocene (270 mV), 1,1′-diacetylferrocene (490 mV), and tris(4-bromophenyl)amine (670 mV) (31). Potentials are referenced to Fc^+/0.

^†Oxidation of 10 mM DHA carried out in MeCN at −30°C under Ar.