Vanadium(II) sulfate - Misplaced Pages

Vanadium(II) sulfate
Identifiers

CAS Number	13566-06-8
3D model (JSmol)	anhydrous: Interactive image hexahydrate: Interactive image
ECHA InfoCard	100.233.281
PubChem CID	166848 anhydrous 22613976 heptahydrate
UNII	IO5B4EXJYI
CompTox Dashboard (EPA)	DTXSID60929102
SMILES anhydrous: .S()(=O)=O hexahydrate: ()()()().S(=O)(=O)
Properties
Chemical formula	H₁₂O₁₀SV
Molar mass	255.09 g·mol
Appearance	violet solid
Density	1.910 g/cm
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Chemical compound

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 SO₄. Compared to the V–O bond length of 191 pm in , the V–O distance is 212 pm in the SO₄. This nearly 10% elongation reflects the effect of the lower charge, hence weakened electrostatic attraction.

The heptahydrate has also been crystallized. The compound is prepared by electrolytic reduction of vanadyl sulfate in sulfuric acid. The crystals also feature centers but with an extra water of crystallization. The salt is isomorphous with ferrous sulfate heptahydrate. A related salt is vanadous ammonium sulfate, (NH₄)₂V(SO₄)₂·6H₂O, a Tutton's salt isomorphous with ferrous ammonium sulfate.

References

^ 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.