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. Author manuscript; available in PMC: 2019 Mar 28.
Published in final edited form as: J Am Chem Soc. 2018 Mar 14;140(12):4191–4194. doi: 10.1021/jacs.7b12707

Figure 2.

Figure 2.

57Fe Mössbauer spectra (hatched lines) for: complex 2 in THF at 5.2 K together with the best fits for hs-FeIII in both the slow-(blue dashed line) and fast-relaxing (blue solid line) regimes (top); same sample as in (top) at 100 K and best fit (blue line) for a fast-relaxing quadrupole doublet as the major component (top middle); complex 1 in THF at 5.2 K and best fit (red line) for a hs-FeII quadrupole doublet (bottom middle); the reaction mixture of 2 and Gomberg’s dimer in THF at 50 °C after 70 min and best fit (red line) for a hs-FeII quadrupole doublet (bottom).