Tracing the iron nitrosyl complex [Fe(2,2-bipyridine(CN)3NO]-

FOI, A.; DI SALVO, F; DOCTOROVICH, F.; ROY, T. G.; STIRNAT, K.; BIEWER, C.; KLEIN, A.

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY

WILEY-V C H VERLAG GMBH

Lugar: Weinheim; Año: 2015

1434-1948

The previously reported complex [Ph4P][Fe(bpy)(CN)3(NO)](bpy = 2,2_-bipyridine) was synthesised and characterised indetail using UV/Vis absorption and IR spectroscopy, cyclicvoltammetry, and single-crystal XRD. Detailed spectroelec11trochemical (UV/Vis, IR and EPR) insight adds perfectly to the previous electrochemical characterisation of this complex.The description of this {Fe(NO)}7 complex as a low-spin FeII?NO? system based on the spectroscopic results is supported by DFT calculations. Reversible oxidation leads to the corresponding {Fe(NO)}6 (FeII?NO+) complex, whereas the 16 reduction to the formal {Fe(NO)}8 species [presumably (FeII?NO?)] occurs irreversibly. When trying to synthesise further derivatives that contain other α-diimine ligands, only for the 1,10-phenanthroline (phen) derivative were some results obtained. For other ligands the obtained materials were too reactive. The reasons for such behaviour are also discussed.