Oxygen substitution of the hexathiodiphosphate (IV) ion in aqueous solution

摘要

Phosphorus-31 NMR and Raman analyses have been performed in order to check the stability of the hexathiodiphosphate (IV) anion [P_2S_6]~(4-) in aqueous solutions. This anion appears to be better stabilized in basic media than in acidic ones. Moreover, a gentle oxidation by a diluted solution of hydrogen peroxide allowed a partial substitution of sulfur by oxygen atoms that leads to mono- and di-substituted anions, respectively, [P_2S_5O]~(4-) and [P_2S_4O_2]~(4-), with a total yield of 72% conversion, compared with the initial hexathiodiphosphate anion.