The Preparation and Characterization of a New Heteropolytungstate Anion [CuW₁₇O₅₇F₅H₅Na]^9-

Abstract

The ammonium salt of the above anion has been isolated in the crystalline form as [(NH₄)₉CuW₁₇O₅₇F₅H₅].8H₂O. Evidence from chemical analysis, x-ray powder pattern, spectroscopy (vis., I. R.), and fast atom bombardment mass spectroscopy, indicates that the anion has the Dawson-Wells structure. A Cu(II) ion replaces one W⁺⁶ of the eighteen tungsten in the original Dawson structure. The anion has been shown to have good in vitro anti-viral activity.