CONVENIENT PREPARATION AND IMPROVED STABILITY OF AQUEOUS INDIUM(I) SOLUTIONS USED IN ELECTRON-TRANSFER REACTIONS

Solutions 0.27 mol dm(-3) in In-I, prepared by treatment of indium ama lgam with silver triflate in dry acetonitrile, are stable for more tha n 5 days in the absence of oxygen and may be diluted 300-fold with wat er to give In-I(aq) solutions which are stable for over 5 h; kinetic p atterns for reactions of [Co(NH3)(5)X](2+) (X = Cl-, Br-, I-, HC2O4-) with In-I point to a pair of consecutive 1 e transactions, the first ( slower) of which is predominantly inner sphere.