Table 1.
properties | 2 | 3 |
---|---|---|
ν(Fe=O) (cm−1) | 798 | 862 |
r(Fe=O) (Å) | 1.64 | 1.59 |
XAS pre-edge area units | 52 | 65 |
E0′(V vs NHE) | 0.44 (pH 12) | 1.19 (pH 7) |
k2 (BnOH) @ RT | 0.08(1) M−1 s−1 | 220(20) M−1 s−1 |
KIE (BnOH oxidation) | ∼3 | ∼12 |
ΔH‡ (kcal/mol) | 10.7 ± 0.7 | 7.9 ± 0.5 |
ΔS‡ (cal/mol/K) | −27 ± 2 | −23 ± 2 |
TΔS‡ (kcal/mol) | −8.1 ± 0.6 | −6.9 ± 0.6 |
ΔG‡ (kcal/mol) | 19 ± 1.2 | 15 ± 1 |