Hexafluorotitanic acid

Hexafluorotitanic acid
Names
IUPAC name
Hexafluorotitanic acid
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.037.676 Edit this at Wikidata
EC Number
  • anhydrous: 241-460-4
  • Key: PFSXARRIPPWGNC-UHFFFAOYSA-J
  • anhydrous: InChI=1/6FH.Ti/h6*1H;/q;;;;;;+4/p-4/f6F.Ti.2H/h6*1h;;;/q6*-1;m;2*+1
  • anhydrous: [H+].[H+].F[Ti-2](F)(F)(F)(F)F
Properties
F6H8O3Ti
Molar mass 217.918 g·mol−1
Appearance colorless solid
Density 2.10 g/cm3
Related compounds
Other anions
 Hexafluorosilicic acid
Ammonium hexafluorotitanate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Hexafluorotitanic acid (systematically named oxonium hexafluoridotitanate(2-)) is an inorganic compound with the chemical formula (H3O)(H5O2)[TiF6]. According to X-ray crystallography, the salt consists of [TiF6]2- octahedral and two kinds of oxonium cations, (H3O)+ and (H5O2)+.[1]

As with most oxonium salts, it is only stable in acidic solution. Under basic conditions, closely related salts hydrolyse to a hydrated titanium dioxide:[2]

(NH4)2TiF6 + 4 NH3 + 2 H2O → TiO2 + 6 NH4F

A related salt is the anhydrous fluoronium hexafluoridotitanate(2-) or (H2F)2[TiF6].

References

  1. ^ Mootz, D.; Oellers, E.-J.; Wiebcke, M. (1988). "Hexafluorotitan(IV)-Saure: Untersuchungen zur Bildung und Struktur kristalliner Hydrate". Zeitschrift für Anorganische und Allgemeine Chemie. 564: 17–25. doi:10.1002/zaac.19885640103.
  2. ^ Bichowsky, Foord Von (1957). "Extraction of Titanium(IV) Oxide from Ilmenite". Inorganic Syntheses. Vol. V. pp. 79–82. doi:10.1002/9780470132364.ch22. ISBN 9780470132364.
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