Silver(I) tetrafluoridooxidovanadate(V) - Ag[VOF4].

Silver(I) tetrafluoridooxidovanadate(V) which contains the polymeric chain anion, [VOF(4)](nn-), has been prepared in reaction between AgNO(3) and VOF(3) in anhydrous HF solvent and characterised in the solid state by single-crystal X-ray diffraction and Raman spectroscopy. Pale yellow crystals of Ag[VOF(4)] crystallise in a monoclinic P2(1)/c space group with a = 5.5452(4) Å, b = 5.0071(3) Å, c = 13.6511(11) Å, beta = 100.543(3)°, and V = 372.63(5) Å(3) at 200 K with Z = 4. The most intense feature in the Raman spectrum is the V=O stretching band of the anion at 1008 cm-1. Solid-state conformational isomerism exists between [VOF(4)](-) anions in crystal structures of Ag[VOF(4)] and previously reported and structurally characterised K[VOF(4)] and Cs[VOF(4)] salts.