Pervanadyl

Pervanadyl
Identifiers
CAS Number	18252-79-4 [chemspider];
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:30048;
ChemSpider	21864966;
Gmelin Reference	1172
	InChI InChI=1S/2O.V/q;;+1 Key: UAZIGFGVBWJXOL-UHFFFAOYSA-N;
	SMILES O=[V+]=O;
Properties
Chemical formula	VO+2
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 is jargon that has two meanings.

Pervanadyl can refer to aquo complexes containing (V O+2). This pale yellow^[1] oxycation of vanadium(V) is the predominant vanadium(V) species in acidic solutions with pH between 0 and 2. Like permanganate, pervanadate features the metal in its highest oxidation state.

Pervanadyl also can refer to peroxo derivatives of vanadium(V) which are often abbreviated VO(O₂)⁺.^[2] Several vanadium(V) peroxides have been characterized.^[3]

Quick facts Identifiers, Properties ...

The former are formed by protonation of vanadium(V) oxide in such solutions:^[4]^[5]

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

The ion can form a complex with a single aminopolycarboxylate ligand,^[6] or with tridentate Schiff base ligands.^[7]

The VO+2/VO²⁺ redox couple is used at the cathode of the vanadium redox battery.^[8] The standard reduction potential of this couple is +1.00 V.^[9]

See also