Pulse radiolysis studies on complexes of iridium

Pulse irradiation of octahedral complexes IrCl63– and IrCl62– indicates that the former may be oxidized or reduced and the latter reduced without structural change occurring within a few µs. The electron transfer reaction forms transient iridium(II) from iridium(III). Contrary to photochemical results irradiation does not promote aquation of the complexes in the early stages of reaction. The spectra, rate constants, and extinction coefficients of the discussed species have been determined.