Fig. 4. 1H NMR spectra (400 MHz, d4-MeOD/0.1 M phosphate buffer D2O, 3/7 v/v, pH* 7.4, 298 K) of (a) complex 7 (1 mM), (b) 15 min, and (c) 3 h after reaction with 10 mol equiv. GSH at 310 K. The broadening of peaks in (b) can be ascribed to paramagnetic effects, and the new set of peaks in (c) assigned to the released phenyl-hydrazo-pyridine (H2azpy) and tri-SG bridged iridium dimer [(Cp*Ir)2(μ-SG)3]+. Red squares denote the 7-SG adducts and * denotes residual CHD2OD.
