Table 1.
Spectroscopic properties of non-heme ferrous-nitrosyl complexes containing O/N ligands.
| {FeNO}7 species | λmax (nm) (ε in M−1 cm−1)a | ν(Fe-NO) (Δ15N) (cm−1) | δ(Fe-N-O) (Δ15N) (cm−1) | ν(N-O) (Δ15N) (cm−1) | Ref. |
|---|---|---|---|---|---|
| Deflavo-FDP-(NO) | 420, 455(1000) | 451 (−9) | not obs. | this work | |
| Deflavo-FDP-(NO)2 | 455 (1000) | 459 (−7) | 444 (−8) | 1749 (−30) | this work |
| Wild-type R2-(NO)2 | 450 (760) | 445 (−7) | 434 (−9) | 1742 (−29) | (21, 23) |
| D84E-R2-(NO)2 | 450 (1200) | 454 (−8) | 442 (−8) | 1735 (−30) | (23) |
| Hemerythrin-(NO) | 408 (1000) | 433 (−6) | 421 (−6) | not obs. | (35) |
| Superoxide reductase-(NO) | 475 (530) | 475 (−7) | 1721 (−31) | (52) | |
| Fe(EDTA)-(NO) | 434 (900) | 496 (−4) | 493 (−10) | 1776 (−37) | this work and (40, 53) |
| [Fe2(NO)2(μ-XDK)(μ- O2CPh)(ImH)2(O2CPh)-(MeOH)] | 450 (1,000) | n.r.b | n.r.b | n.r.b | (23) |
| Fe2(NO)2(Et-HPTB)(O2CPh)(BF4)2 | n.r.b,c. | n.r.b | n.r.b | 1785 | (47) |
a
per iron.
b
not reported.
c
obscured by ligand absorptions.