Synthesis and Characterization of Na5[VO4][O] and Na4[VO4][OH]

Na5[VO4][O] and Na4[VO4][OH] were obtained from reactions of V2O5 with Na2O and additional NaOH in the latter case, respectively, at 600-700 °C in sealed Ag containers under Ar atmosphere. The crystal structures have been determined from X-ray single crystal data. The structures contain isolated [VO4]3− complexes and non-coordinating oxide and hydroxide anions, respectively. Raman and infrared data is compared for both compounds and hydrogen bonding is discussed for Na4[VO4][OH].