Table 1.
complexa | vO-O (Δ18O2) | vFe-O (Δ18O2) | ref |
---|---|---|---|
Mb WT | 1103 | 578 (−29) | 46 |
Cyt P450 WT | 1139 (−66) | 546 (−31) | 47 |
Cyt P450 D251N | 1136 (−66) | 537 (−30) | 48 |
(THF)(F8)FeIII−(O2•−) | 1178 (−64) | 568 (−24) | 49 |
(6L)FeIII−(O2•−) | 1176 (−64) | 572 (−24) | 33 |
(PIm)FeIII−(O2•−) | 1180 (−56) | 575 (−23) | 50 |
(PImH)FeIII−(O2•−) (2) | 1171 (−61) | 575 (−24) | this work |
[(α4Fe(CO2Me)4)O2•−] | 1004(−53) | 581 (−22) | 51 |
967 (−56) | |||
[(FeIII(OPhP))−O2•−] | 1147 (−59) | 570 (−22) | 44 |
Mb WT, wild-type myoglobin; Cyt P450 WT, wild-type cytochrome P-450 monooxygenase (P450); P450 Asp-251 mutated to Asn. See Figure S2 for diagrams of the other synthetic FeIII−(O2•−) complexes.