An organotemplated vanadium(IV) borate polymer from boric acid ‘flux’ synthesis, [H2en]4[Hen]2[V6B22O53H8]·5H2O

Abstract

A new 1-D inorganic chain polymer [H₂en]₄[Hen]₂[V₆- B₂₂O₅₃H₈]·5H₂O, consisting of [V₆B₂₀O₅₀H₆] cluster subunits linked together through diborate bridges, has been synthesised with high yield and purity by a molten boric acid ‘flux’ method in which V₂O₅, en and H₃BO₃ (1 : 6 : 25) were heated together at 180 °C for 3 days; the clusters have a central band of six square-pyramidal V^IVO vanadyl groups, which are capped top and bottom by two raft-like polyborate ligands of formula [B₁₀O₁₆H₃].