Protonation Equilibria of Mononuclear Vanadate: Thermodynamic Evidence for the Expansion of the Coordination Number in VO2
A spectrophotometric investigation of the protonation of HVO4 2- has been conducted at vanadium(V) concentrations low enough (5 × 10-5 mol dm-3) to prevent the formation of polynuclear ions. Equilibrium constants as well as enthalpy and entropy changes for the formation of H2VO4 - and VO2 + have bee...
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| Veröffentlicht in: | Inorganic chemistry 1996-03, Vol.35 (6), p.1556-1559 |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | A spectrophotometric investigation of the protonation of HVO4 2- has been conducted at vanadium(V) concentrations low enough (5 × 10-5 mol dm-3) to prevent the formation of polynuclear ions. Equilibrium constants as well as enthalpy and entropy changes for the formation of H2VO4 - and VO2 + have been determined in ionic medium: 1.0 mol dm-3 NaCl and NaClO4, respectively. The percentage concentration of the neutral species, H3VO4, is so low (apparently |
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| ISSN: | 0020-1669 1520-510X |
| DOI: | 10.1021/ic950832b |