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Freeze‐trapped 80 K 57Fe Mössbauer spectra of iron speciation during catalysis in THF. Mössbauer parameters for purple component (1) δ=0.78 mm/s |ΔEQ|=2.76 mm/s, blue component (2) δ=0.55 mm/s |ΔEQ|=2.05 mm/s and orange component δ=0.41 mm/s |ΔEQ|=0.64 mm/s.
