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The 80 K Mössbauer spectra of the iron species in solution (A) following reaction of 57FeCl2(SciOPP) (57Fe–1-Cl2) with 1 equiv PhMgBr at 25 °C in 1:1 THF/2-MeTHF for 1 min and (B) after subsequent addition of 20 equiv bromocycloheptane and reaction for 15 s. The individual Mössbauer components are identified as 4a (red), 4b (blue), 5-X (green), and 1-X2 (beige).
