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Vanadium(II) sulfate

Chemical compound From Wikipedia, the free encyclopedia

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.[2]

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Vanadium(II) sulfate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.233.281 Edit this at Wikidata
EC Number
  • anhydrous: 806-241-5
UNII
  • anhydrous: InChI=1S/H2O4S.V/c1-5(2,3)4;/h(H2,1,2,3,4);/q;+2/p-2
    Key: VLOPEOIIELCUML-UHFFFAOYSA-L
  • hexahydrate: InChI=1S/H2O4S.6H2O.V/c1-5(2,3)4;;;;;;;/h(H2,1,2,3,4);6*1H2;/q;;;;;;;+2/p-2
    Key: LRLWNWIKXRXQMV-UHFFFAOYSA-L
  • anhydrous: [V+2].[O-]S([O-])(=O)=O
  • hexahydrate: O.O.O.O.O.O.O=S(=O)([O-])[O-].[V+2]
  • heptahydrate: O.O.O.O.O.O.O.O=S(=O)([O-])[O-].[V+2]
Properties
H12O10SV
Molar mass 255.09 g·mol−1
Appearance violet solid
Density 1.910 g/cm3
Hazards
GHS labelling:[1]
GHS07: Exclamation mark
Warning
H302
P264, P270, P301+P317, P330, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The heptahydrate has also been crystallized. The compound is prepared by electrolytic reduction of vanadyl sulfate in sulfuric acid.[2][3] The crystals feature [V(H2O)6]2+ centers but with an extra water of crystallization. The salt is isomorphous with ferrous sulfate heptahydrate.[4] A related salt is vanadous ammonium sulfate, (NH4)2V(SO4)2·6H2O, a Tutton's salt isomorphous with ferrous ammonium sulfate.[5]

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