Investigations of the V/O/RAsO₃^2- system: Solvothermal synthesis and crystal and molecular structure of [(V ₂O₃)(Ph₆As₆O₁₄)]

The reaction of PPh₄[VO₂Cl₂] with PhAsO₃H₂ in acetonitrile for 36 h at 100 °C and autogenous pressure yields [(V₂O₃)(Ph₆As ₆O₁₄)], an unusual cluster with a {V₂O ₃}⁴⁺ core straddled by the hexadentate ligand {Ph ₆As₆O₁₄}^4-, which forms via thermally induced condensation of PhAsO₃H₂ groups.