Synthesis and Characterization of Stable Iron Pentacarbonyl Radical Cation Salts
Jan M. Rall, Marcel Schorpp, Martin Keilwerth, Maximilian Mayländer, Christian Friedmann, Michael Daub, Sabine Richert, Karsten Meyer, Ingo Krossing
Abstract
Abstract The open‐shell iron pentacarbonyl cation [Fe(CO) 5 ] .+ was isolated by deelectronation, i.e., the single‐electron oxidation of the parent neutral Fe(CO) 5 using [phenazine F ] .+ as the [Al(OR F ) 4 ] − and [F‐{Al(OR F ) 3 } 2 ] − salt (R F =C(CF 3 ) 3 ; phenazine F =perfluoro‐5,10‐bis(perfluorophenyl)‐5,10‐dihydrophenazine). [Fe(CO) 5 ] .+ [Al(OR F ) 4 ] − was fully characterized (scXRD analysis, IR, NMR, EPR, 57 Fe spectroscopy, CV and SQUID magnetization study) and, apart from being a compound of fundamental interest, may serve as a precursor for low‐valent iron coordination chemistry.