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Vanadium(II) sulfate
_sulfate&sq=&lang=&file=File:V(aq)6SO4.png) | |
| Identifiers | |
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3D model (JSmol)
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| ECHA InfoCard | 100.233.281 |
PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| H12O10SV | |
| Molar mass | 255.09 g·mol−1 |
| Appearance | violet solid |
| Density | 1.910 g/cm3 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Vanadium(II) sulfate describes a family of inorganic compounds with the formula VSO4(H2O)x where 0 ≤ x ≤ 7. The hexahydrate is most commonly encountered. It is a violet solid that dissolves in water to give air-sensitive solutions of the aquo complex. The salt is isomorphous with [Mg(H2O)6]SO4. Compared to the V–O bond length of 191 pm in [V(H2O)6]3+, the V–O distance is 212 pm in the [V(H2O)6]SO4. This nearly 10% elongation reflects the effect of the lower charge, hence weakened electrostatic attraction.[1]
The heptahydrate has also been crystallized. The compound is prepared by electrolytic reduction of vanadyl sulfate in sulfuric acid.[1][2] The crystals also feature [V(H2O)6]2+ centers but with an extra water of crystallization. The salt is isomorphous with ferrous sulfate heptahydrate.[3] A related salt is vanadous ammonium sulfate, (NH4)2V(SO4)2·6H2O, a Tutton's salt isomorphous with ferrous ammonium sulfate.[4]
- ^ a b Cotton, F. A.; Falvello, L. R.; Llusar, R.; Libby, E.; Murillo, C. A.; Schwotzer, W. (1986). "Synthesis and Characterization of Four Vanadium(II) Compounds, Including Vanadium(II) Sulfate Hexahydrate and Vanadium(II) Saccharinates". Inorganic Chemistry. 25 (19): 3423–3428. doi:10.1021/ic00239a021.
- ^ Kranz, M. (1963). "Vanadium(II) Sulfate". Inorganic Syntheses. Inorganic Syntheses. Vol. 7. pp. 94–96. doi:10.1002/9780470132388.ch29. ISBN 978-0-470-13238-8.
- ^ Cotton, F. A.; Falvello, L. R.; Murillo, C. A.; Pascual, I.; Schultz, A. J.; Tomas, M. (1994). "Neutron and X-Ray Structural Characterization of the Hexaaquavanadium(II) Compound V(SO4)·7H2O". Inorganic Chemistry. 33 (24): 5391–5395. doi:10.1021/ic00102a009.
- ^ Montgomery, H.; Morosin, B.; Natt, J. J.; Witkowska, A. M.; Lingafelter, E. C. (1967). "The crystal structure of Tutton's salts. VI. Vanadium(II), iron(II) and cobalt(II) ammonium sulfate hexahydrates". Acta Crystallographica. 22 (6): 775–780. Bibcode:1967AcCry..22..775M. doi:10.1107/S0365110X67001550.
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