Kinetic and spectroscopic observations on the azidyl, N3, radical oxidation of fac-(Lspectator)ReI(CO)3(Lacceptor) to fac-(Lspectator)ReII(CO)3(Lacceptor), Lspectator = 4,4′-bpy; Lacceptor = dipyridyl[3,2-a:2′3′-c]phenazine or Lspectator = Clâ

The oxidation of two triscarbonyl fac-(Lspectator)ReI(CO)3(Lacceptor)z complexes (Lspectator = 4,4′-bpy; Lacceptor = dipyridil[3,2-a:2′3′-c]phenazine (dppz) and z = + or Lspectator = Cl−; Lacceptor = bathocuproinedisulfonate (bcds2−) and z = 2-) by azidyl radicals, N3, was investigated by pulse radiolysis. It was demonstrated that the redox potential of the azidyl radicals is EN3/N3-0=1.70VversusNHE, a value larger than one communicated earlier, and that the self-exchange rate constant of the N3/N3- couple is kN3/N3-=2.7×106M-1s-1.