Fig. 2. (Left) UV-vis absorption spectra of FeII(L1,2,3)3]2+ (1, 2, 5) in MeCN and their corresponding complexes [FeIII2(μ-O2)(L1,2,3)2(S)2]4+ (3, 4 and 6) generated by addition of 4 equiv. H2O2 at 25 °C (inset). (Right) Raman spectrum of 6 at 785 nm generated from 5 (10 mM) by addition of 2 equiv. H2O2, with solvent signals subtracted.
