CONICET | Buscador de Institutos y Recursos Humanos

Pentachloronitrosyliridate(III) ([IrCl5NO]?), the most nucleophilic NO+ known to date, can bereduced chemically and/or electrochemically by one or two electrons to produce the NO● andHNO/NO? forms. The nitroxyl complex can be formed either by hydride attack to the NO+ in organicsolvent, or by decomposition of iridium-coordinated nitrosothiols in aqueous solutions, while NO● isproduced electrochemically or by reduction of [IrCl5(NO)]? with H2O2. Both NO● and HNO/NO?complexes are stable under certain conditions but tend to labilize the trans chloride and even thecis ones after long periods of time. As expected, the NO+ is practically linear, although the IrNOmoiety is affected by the counterions due to dramatic changes in the solid state arrangement. Theother two nitrosyl redox states comprise bent structures.