Tetranuclear Heterometallic Iron(II)–Lithium Carboxylates Stabilized by N-Donor Ligands: Synthesis and Structure

Abstract

The multicomponent chemical reactions of Fe(SO4)∙7H2O, Li(Рiv), K(Рiv) (Рiv is pivalate anion), and heterocyclic N-donor ligands (pyridine (Рy), 1,10-phenanthroline (Рhen)) in anhydrous acetonitrile under an inert atmosphere afford new heterometallic tetranuclear complexes [FeII2Li2(Рiv)6(Рy)4] (I) and [FeII2Li2(Рiv)6(Рhen)2] (II) in which all carboxylate anions act as bridging ligands. The molecular and crystal structures of the compounds are determined by X-ray diffraction (XRD) (CIF files CCDC nos. 2220576 (I) and 2220577 (II·2CH3CN). In the studied complexes, the iron(II) atoms exist in the distorted octahedral ligand environment.