Fig. 9: NMR spectroscopy about ligand protonation.
From: Exchange coupling states of cobalt complexes to control proton-coupled electron transfer

a Temperature-dependent 400 MHz 2H NMR spectra of 3[2]+ with PhND2·DBF4 in CH3CN, a free PhND2·DBF4 peak is given for comparison. b Temperature-dependent 400 MHz Evans method 1H NMR spectra of 3[2]+ with PhNH2·HBF4 (10 mM).