Pervanadyl

Pervanadyl
Identifiers
3D model (JSmol)	Interactive image;
	InChI InChI=1S/2O.V/q;;+1 Key: UAZIGFGVBWJXOL-UHFFFAOYSA-N;
	SMILES O=[V+]=O;
Properties
Chemical formula	O2V+
Molar mass	82.939 g·mol−1
Related compounds
Related compounds	Vanadyl
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Pervanadyl (V O+2) is a pale yellow oxycation of vanadium(V). It is the predominant vanadium(V) species in acidic solutions with pH between 0 and 2, and its salts are formed by protonation of vanadium(V) oxide in such solutions:

V₂O₅ + 2 H⁺ → 2 VO+2 + H₂O (K = 3.42×10⁻²)

The ion can form a complex with a single aminopolycarboxylate ligand, or with tridentate Schiff base ligands.

The VO+2/VO²⁺ redox couple is used at the cathode of the vanadium redox battery. The standard reduction potential of this couple is +1.00 V.

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