Extended structure constructed from organic ligands functionalized sandwich-type tungstoferrates

Two new compounds constructed from mixture-valence {Fe6}-cluster-containing sandwich-type tungstoferrates functionalized by N-donor ligands, (H2enMe)5{FeIII2FeII2(HenMe)2[B-α-FeW9O34]2}∙12H2O (1) and (H2enMe)3FeII(enMe)2H2{FeIII2FeII2 (HenMe)2[B-α-FeIIIW9O34]2}∙13H2O (2) (enMe = 1,2-diaminopropane) have been synthesized under hydrothermal conditions. Compound 1 is an isolated {Fe6}-cluster-containing sandwich-type tungstoferrate functionalized by two enMe ligands. Compound 2 exhibits a 1-D chain-like structure composed of the sandwich-type polyoxoanions linked by iron linkers via the bridging oxygen atoms, representing the first extended structure based on tungstoferrates. Also, the sandwich-type polyoxoanions coordinating with the transition-metal (TM) linkers with the bridging oxygen atoms is rarely observed in the polyoxometalate (POM) chemistry.