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. 2017 Aug 14;56(34):10108-10113.
doi: 10.1002/anie.201612299. Epub 2017 Mar 2.

Two Exceptional Homoleptic Iron(IV) Tetraalkyl Complexes

Alicia Casitas  1 , Julian A Rees  2   3 , Richard Goddard  1 , Eckhard Bill  2 , Serena DeBeer  2   4 , Alois Fürstner  1
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Two Exceptional Homoleptic Iron(IV) Tetraalkyl Complexes

Alicia Casitas et al. Angew Chem Int Ed Engl. .

Abstract

The formation of the high-valent iron complex [Fe(cyclohexyl)4 ] from FeII under reducing conditions is best explained by disproportionation of a transient organoiron intermediate which is driven by dispersive forces between the cyclohexyl ligands and the formation of short and strong Fe-C bonds. The (meta)stability of this diamagnetic complex (S=0) is striking if one considers that it has empty d-orbitals at its disposal and contains, at the same time, no less than twenty H-atoms available for either α- or β-hydride elimination.

Keywords: London dispersive forces; hydride elimination; iron; transition metal complexes.

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