Fig. 3: Characterization of 1-X and 2-X.
From: From 18- to 20-electron ferrocene derivatives via ligand coordination
a 57Fe Mössbauer spectrum of 1-H recorded at 77 K. b 57Fe Mössbauer spectrum of 2-NMe2 recorded at 77 K. c Fitting parameters for the 57Fe Mössbauer spectra of 1-X and 2-X at 77 K and ferrocene (FeCp2) at 90 K35. d 1H NMR spectra (500.13 MHz, −40 °C) of an equilibrium mixture of 1-NMe2 and 2-NMe2 in toluene-d8, as well as corresponding signal assignments (a–e and a′–e′). Two separate spectra recorded between 380 ppm to −20 ppm and between 20 ppm to −380 ppm were combined to show the entire region with accurate baseline corrections and integration values (see Supplementary Fig. 25 for an uninterrupted spectrum). s: Residual solvent signals from toluene-d8.
