Fig 1.

UV-vis spectra observed in CH3CN at −40 °C upon O2 exposure of 1 mM Cr(OTf)2 (red) and a mixture of 1 mM Fe(TMC)(OTf)2 and 1 mM Cr(OTf)2 (black). Bands with asterisks are associated with 1.

UV-vis spectra observed in CH3CN at −40 °C upon O2 exposure of 1 mM Cr(OTf)2 (red) and a mixture of 1 mM Fe(TMC)(OTf)2 and 1 mM Cr(OTf)2 (black). Bands with asterisks are associated with 1.