Establishing the NO oxidation state in complexes [Cl5(NO)M]n−, M = Ru or Ir, through experiments and DFT calculations

Autor: Sieger, Monika, Sarkar, Biprajit, Záliš, Stanislav, Fiedler, Jan, Escola, Natalia, Doctorovich, Fabio, Olabe, José A., Kaim, Wolfgang
Zdroj: Dalton Transactions; 2004, Vol. 2004 Issue: 12
Abstrakt: Predominantly NO-centered reduction was observed by EPR and IR spectroelectrochemistry to occur reversibly at low temperatures for [Cl5Ir(NO)]. In contrast, the [Cl5Ru(NO)]2− ion was found to undergo only irreversible reduction but reversible oxidation to a ruthenium(iii) species at −40°C. DFT calculations were used to establish the electronic structures and to rationalise the different stabilities. The calculations also reveal orientation-dependent energies and EPR properties between staggered and eclipsed conformations.
Databáze: Supplemental Index