20644-97-7

Basic information

• Product Name: oxovanadium IV
• Synonyms: oxovanadium IV
• CAS NO: 20644-97-7
• Molecular Formula: OV
• Molecular Weight: 66.9398
• Mol File: 20644-97-7.mol
• Article Data: 6

Chemical Properties

• Boiling Point: °Cat760mmHg
• Flash Point: °C
• Appearance: /
• Density: g/cm³
• CAS DataBase Reference: oxovanadium IV(CAS DataBase Reference)
• NIST Chemistry Reference: oxovanadium IV(20644-97-7)
• EPA Substance Registry System: oxovanadium IV(20644-97-7)

Safety Data

• Hazardous Substances Data: 20644-97-7(Hazardous Substances Data)

Usage

InChI:InChI=1/O.V/q;+2/rOV/c1-2/q+2

Upstream product

• 13637-70-2 vanadyl (V) chloride azide 
• 7732-18-5 water 
• 345901-75-9 VO(OO)⁽¹⁺⁾ 
• 22541-63-5 cobalt(III) 
• 15696-18-1 hexaaquavanadium(II) 
• 18252-79-4 vanadium(V) ion 
• 7782-77-6 cis-nitrous acid 
• 87970-45-4 <2-methyl-2-<3,5-di-tert-butyl-4-hydroxyphenyl>-propyl>ammonium chloride 
• 67-63-0 isopropyl alcohol 

Downstream Products

• 18252-79-4 vanadium(V) ion 
• 3153-26-2 bis(acetylacetonate)oxovanadium 
• 93459-83-7 VO(benzene-1,2-diol) 
• 16065-83-1 chromium (III) ion 
• 22541-77-1 vanadium(III) 
• 79245-58-2 VO(C₇H₄NSNHC(S)NC₆H₅)2 
• 22541-53-3 cobalt(II) 

Relevant articles and documents

Kinetics and mechanisms of the redox reactions of the hydroperoxochromium(III) ion

The reactions of the hydroperoxochromium(III) ion, (H2O)5CrO2H2+ (CrO2H2+), with Fe2+, VO2+, V2+, Cu+, Ti3+, Co([14]aneN4)2+, Co(Me6[14]aneN4)2+, Co(tim)2+, and [Ru(NH3)6]2+ have been studied in acidic aqueous solution. The reactions are accompanied by large negative entropies of activation, -110 J mol-1 K-1 for Fe2+ and -85 J mol-1 K-1 for Ti3+. All the reactions studied follow an isokinetic relationship in that ΔH? is a linear function of ΔS?. The same is true for the analogous reactions of H2O2. It is proposed that the reactions of CrO2H2+ take place by an inner-sphere, Fenton-type process yielding pentaaquaoxochromium(IV), (H2O)5CrO2+ (CrO2+), as an intermediate. The reactivity of CrO2H2+ as an oxygen transfer reagent is about 20 times greater than that of H2O2. For example, the reactions with (en)2CoSCH2CH2NH22+ to yield (en)2CoS(O)CH2CH2NH22+ have rate constants 20.5 ± 0.4 M-1 s-1 (CrO2H2+) and 1.36 M-1 s-1 (H2O2), both in 0.1 M HClO4 at 25°C. The chromyl ion, CrO2+, oxidizes CrO2H2+ to CrO22+ with a rate constant of (1.34 ± 0.06) × 103 M-1 s-1 in 0.10 M HClO4 in H2O and 266 ± 10 M-1s-1 in D2O.

Kinetics and Mechanism of Oxalic Acid Catalysed Oxidation of Nitrous Acid by Vanadium(V)

The kinetics and mechanism of the oxalic acid catalysed oxidation of nitrous acid by vanadium(V) have been studied in 1 M perchloric acid medium.The reaction is first order each in vanadium(V) and nitrite and fractional order in oxalic acid.Nitrate ion retards the rate of the reaction.At low +>(0.5-1.2 M) the rate of the reaction is independent of +> but at higher concentrations, the rate decreases.Kinetic as well as spectrophotometric evidence for the formation of a 1:1 complex between vanadium(V) and oxalic acid has been obtained and a mechanism involving this complex has been proposed.