Ammonium hexafluorovanadate

Last updated
Ammonium hexafluorovanadate
Names
IUPAC name
Ammonium hexafluorovanadate
Other names
Ammonium hexafluorovanadate(III), triammonium vanadium hexafluoride, triammonium hexafluorovanadate(3-)
Identifiers
3D model (JSmol)
ChemSpider
PubChem CID
  • InChI=1S/6FH.3 H3N.V/h6*1H;3*1 H3;/p-3
    Key: PURSFTZXXIKJST-UHFFFAOYSA-K
  • [F-].[F-].[F-].[F-].[F-] .[F-].[V].[NH4+].[NH 4+].[NH4+]
Properties
F6H12N3V
Molar mass 219.049 g·mol−1
AppearancePowder
Density g/cm3
Melting point 300
Hazards
GHS labelling:
GHS-pictogram-skull.svg
Danger
H301, H311, H319, H331
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Ammonium hexafluorovanadate is an inorganic chemical compound with the chemical formula (NH4)3VF6. [1] [2] [3]

Contents

Synthesis

The compound can be prepared by a fusion of ammonium hydrogen fluoride and vanadium trioxide. [4]

Also, a reaction of vanadium trioxide and ammonium bifluoride can produce the compound. [5]

Physical properties

Ammonium hexafluorovanadate forms powder. It is toxic. [6]

Chemical properties

The compound decomposes to vanadium pentoxide if heated in open air: [7]

4(NH4)3VF6 + 11O2 → 2V2O5 + 6N2 + 12H2O + 24HF

Uses

Ammonium hexafluorovanadate is typically used as a catalyst at temperatures below 400 °C.

Related Research Articles

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<span class="mw-page-title-main">Ammonium hydrosulfide</span> Chemical compound

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<span class="mw-page-title-main">Terbium(III,IV) oxide</span> Chemical compound

Terbium(III,IV) oxide, occasionally called tetraterbium heptaoxide, has the formula Tb4O7, though some texts refer to it as TbO1.75. There is some debate as to whether it is a discrete compound, or simply one phase in an interstitial oxide system. Tb4O7 is one of the main commercial terbium compounds, and the only such product containing at least some Tb(IV) (terbium in the +4 oxidation state), along with the more stable Tb(III). It is produced by heating the metal oxalate, and it is used in the preparation of other terbium compounds. Terbium forms three other major oxides: Tb2O3, TbO2, and Tb6O11.

<span class="mw-page-title-main">Erbium(III) chloride</span> Chemical compound

Erbium(III) chloride is a violet solid with the formula ErCl3. It is used in the preparation of erbium metal.

<span class="mw-page-title-main">Yttrium(III) chloride</span> Chemical compound

Yttrium(III) chloride is an inorganic compound of yttrium and chloride. It exists in two forms, the hydrate (YCl3(H2O)6) and an anhydrous form (YCl3). Both are colourless salts that are highly soluble in water and deliquescent.

<span class="mw-page-title-main">Ytterbium(III) chloride</span> Chemical compound

Ytterbium(III) chloride (YbCl3) is an inorganic chemical compound. It reacts with NiCl2 to form a very effective catalyst for the reductive dehalogenation of aryl halides. It is poisonous if injected, and mildly toxic by ingestion. It is an experimental teratogen, known to irritate the skin and eyes.

<span class="mw-page-title-main">Vanadium(III) fluoride</span> Chemical compound

Vanadium(III) fluoride is the chemical compound with the formula VF3. This yellow-green, refractory solid is obtained in a two-step procedure from V2O3. Similar to other transition-metal fluorides (such as MnF2), it exhibits magnetic ordering at low temperatures (e.g. V2F6.4H2O orders below 12 K).

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<span class="mw-page-title-main">Ammonium heptamolybdate</span> Chemical compound

Ammonium heptamolybdate is the inorganic compound whose chemical formula is (NH4)6Mo7O24, normally encountered as the tetrahydrate. A dihydrate is also known. It is a colorless solid, often referred to as ammonium paramolybdate or simply as ammonium molybdate, although "ammonium molybdate" can also refer to ammonium orthomolybdate, (NH4)2MoO4, and several other compounds. It is one of the more common molybdenum compounds.

Ammonium fluorosilicate (also known as ammonium hexafluorosilicate, ammonium fluosilicate or ammonium silicofluoride) has the formula (NH4)2SiF6. It is a toxic chemical, like all salts of fluorosilicic acid. It is made of white crystals, which have at least three polymorphs and appears in nature as rare minerals cryptohalite or bararite.

Ammonium orthomolybdate is the inorganic compound with the chemical formula (NH4)2MoO4. It is a white solid that is prepared by treating molybdenum trioxide with aqueous ammonia. Upon heating these solutions, ammonia is lost, to give ammonium heptamolybdate ((NH4)6Mo7O24·4H2O).

Ammonium dimolybdate (ADM) is the inorganic compound with the formula (NH4)2Mo2O7. It is a white, water-soluble solid. ADM is an intermediate in the production of molybdenum compounds from its ores. Roasting typical ore produces crude molybdenum(VI) oxides, which can be extracted into aqueous ammonia, affording ammonium molybdate. Heating solutions of ammonium molybdate gives ADM. Upon heating, solid ammonium dimolybdate decomposes to molybdenum trioxide:

<span class="mw-page-title-main">Vanadium(II) sulfate</span> 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 [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.

Erbium compounds are compounds containing the element erbium (Er). These compounds are usually dominated by erbium in the +3 oxidation state, although the +2, +1 and 0 oxidation states have also been reported.

Ammonium hexafluoroferrate is an inorganic chemical compound with the chemical formula (NH4)3FeF6.

Ammonium hexafluoroindate is an inorganic chemical compound with the chemical formula (NH4)3InF6.

References

  1. "Ammonium Hexafluorovanadate(III)". American Elements . Retrieved 23 August 2024.
  2. "AMMONIUM HEXAFLUOROVANADATE(III) 99.99%". chemicalbook.com. Retrieved 23 August 2024.
  3. Lewis (Sr.), Richard J.; Sweet, Doris V. (1986). Regulations, Recommendations, and Assessments Extracted from RTECS: A Subfile of the Registry of Toxic Effcts of Chemical Substances. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health. p. 205. Retrieved 23 August 2024.
  4. Booth, Harold Simmons (1963). Inorganic Syntheses. London. p. 88. Retrieved 23 August 2024.{{cite book}}: CS1 maint: location missing publisher (link)
  5. Wani, B. N.; Rao, U. R. K. (May 1991). "Fluorination of Vanadium Oxides". Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry. 21 (5): 779–791. doi:10.1080/15533179108016842 . Retrieved 29 August 2024.
  6. "Ammonium hexafluorovanadate(III) (CAS 13815-31-1)". scbt.com . Retrieved 23 August 2024.
  7. Kleinberg, Jacob (22 September 2009). Inorganic Syntheses, Volume 7. John Wiley & Sons. p. 90. ISBN   978-0-470-13270-8 . Retrieved 23 August 2024.