A Ferrocene-Based Dicationic Iron(IV) Carbonyl Complex
Overview
Affiliations
The 16-valence electron species [Cp* Fe] (Cp*=η-C Me ), formally featuring a tetravalent iron ion, quantitatively binds CO in HF solution to form the stable, diamagnetic carbonyl species [Cp* Fe(CO)] . This dication forms salts in the presence of AsF and SbF that were crystallographically characterized. The molecular structure in crystals of [Cp* Fe(CO)](AsF ) displays cyclopentadienyl rings that are clearly not parallel and an equatorially bound η -CO ligand. The formal oxidation state +IV of iron was investigated by Fe Mössbauer spectroscopy and is supported by DFT computational analysis. A detailed spectroscopic characterization of the hitherto unprecedented high-valent iron carbonyl compounds is reported.
Solvent-Dependent Reactivity of Fe(CO) under Superacidic and Oxidative Conditions.
Berg W, Reimann M, Sievers R, Rupf S, Schlogl J, Weisser K J Am Chem Soc. 2025; 147(4):3039-3046.
PMID: 39806569 PMC: 11783529. DOI: 10.1021/jacs.4c09595.
A homoleptic Fe(iv) ketimide complex with a low-lying excited state.
Hertler P, Sauza-de la Vega A, Daru A, Sarkar A, Lewis R, Wu G Chem Sci. 2024; .
PMID: 39309088 PMC: 11411412. DOI: 10.1039/d4sc04880f.
Towards clustered carbonyl cations [M(CO)] (M = Ru, Os): the need for innocent deelectronation.
Sellin M, Friedmann C, Maylander M, Richert S, Krossing I Chem Sci. 2022; 13(32):9147-9158.
PMID: 36093020 PMC: 9384829. DOI: 10.1039/d2sc02358j.
Introducing the Perfluorinated Cp* Ligand into Coordination Chemistry.
Sievers R, Sellin M, Rupf S, Parche J, Malischewski M Angew Chem Int Ed Engl. 2022; 61(43):e202211147.
PMID: 35984742 PMC: 9826324. DOI: 10.1002/anie.202211147.
d-d Dative Bonding Between Iron and the Alkaline-Earth Metals Calcium, Strontium, and Barium.
Stegner P, Farber C, Oetzel J, Siemeling U, Wiesinger M, Langer J Angew Chem Int Ed Engl. 2020; 59(34):14615-14620.
PMID: 32463527 PMC: 7496664. DOI: 10.1002/anie.202005774.