Oxidation states and photoinduced metastable states in [Fe(CO)2(NO)2]

The electrochemistry of the complex [Fe(CO)2(NO)2] and the IR and EPR spectra of the one-electron reduced [Fe(CO)2(NO)2]− and one-electron oxidised species [Fe(CO)2(NO)2]+ reveal mainly NO-centred spin density for the unpaired electron. The results are discussed in term of oxidation states. Furthermore, the parent complex was investigated for light-induced linkage isomerisation using IR spectroscopy. Thermally and optically reversible generation of a new species identified by new vibrational bands is interpreted in terms of photoinduced nitrosyl linkage isomers.

Graphical abstractThe redox chemistry of [Fe(CO)2(NO)2] using IR- and EPR-spectrochemistry and metastable photoinduced states using IR-spectroscopy have been studied in detail providing an insight into the frontier orbitals of this tetrahedral complex.Figure optionsDownload full-size imageDownload as PowerPoint slide