Building blocks as disposition in solution: [{MoVIO3(H2O)}10{VIVO(H2O)}20{(MoVI/MoVI5O21)(H2O)3}10({MoVIO2(H2O)2}5/2)2 ({NaSO4}5)2]20–, a giant spherical cluster with unusual structural features of interest for supramolecula

Abstract

The unique polyoxometalate compound Na₂₀[{Mo^VIO₃- (H₂O)}₁₀{V^IVO(H₂O)}₂₀{(Mo^VI/Mo^VI₅O₂₁)(H₂O)₃}₁₀({Mo^VI- O₂(H₂O)₂}_5/2)₂ ({NaSO₄}₅)₂]·xH₂O 1 (x ≈ 170) shows remarkable structural features: e.g. (i) {Mo^VI/Mo^VI₅}-type pentagons as building blocks (being present in the relevant reaction medium as disposition), (ii) a ‘magnetic ring-shaped band’ built up by ten linked {V^IV₃} triangles having common corners and (iii) two {NaSO₄}₅ rings encapsulated inside the cavity of an icosidodecahedron formed by twenty triangular and twelve pentagonal faces built up by ten Mo^VI and twenty V^IV centres, respectively.