Tellurium tetrafluoride

Tellurium tetrafluoride
Names

IUPAC name tellurium(IV) fluoride
Identifiers
CAS Number	15192-26-4^Y
PubChem	167258
Properties
Chemical formula	TeF₄
Molar mass	203.594
Appearance	white crystalline solid
Melting point	129 °C (264 °F; 402 K)
Related compounds
Other anions	tellurium dioxide, tellurium tetrachloride, tellurium(IV) bromide, tellurium(IV) iodide
Other cations	sulfur tetrafluoride, selenium tetrafluoride
Related compounds	tellurium hexafluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is ^YN ?)
Infobox references

Tellurium tetrafluoride, TeF₄, is a stable, white, hygroscopic crystalline solid and is one of two fluorides of tellurium. The other binary fluoride is tellurium hexafluoride.^[1] The widely reported Te₂F₁₀ has been shown to be F₅TeOTeF₅ ^[1] There are other tellurium compounds that contain fluorine, but only the two mentioned contain solely tellurium and fluorine. Tellurium difluoride, TeF₂, and ditellurium fluoride, Te₂F are not known.^[1]

Preparation

Tellurium tetrafluoride can be prepared by the following reaction:

TeO₂ + 2SF₄ → TeF₄ + 2SOF₂

It is also prepared by reacting nitryl fluoride with tellurium or from the elements at 0 °C or by reacting selenium tetrafluoride with tellurium dioxide at 80 °C.
Fluorine in nitrogen can react with TeCl₂ or TeBr₂ to form TeF₄. PbF₂ will also fluorinate tellurium to TeF₄.

Reactivity

Tellurium tetrafluoride will react with water or silica and forms tellurium oxides. Copper, silver, gold or nickel will react with tellurium tetrafluoride at 185 °C. It does not react with platinum. It is soluble in SbF₅ and will precipitate out the complex TeF₄SbF₅.

Properties

Te coordination

Tellurium tetrafluoride melts at 130 °C and decomposes to tellurium hexafluoride at 194 °C. In the solid phase it consists of infinite chains of TeF₃F_2/2 in an octahedral geometry. A lone pair of electrons occupies the sixth position.

References

R.B. King; Inorganic Chemistry of Main Group Elements, VCH Publishers, New York, 1995.
W.C. Cooper; Tellurium, VanNostrand Reinhold Company, New York, 1971.

1 2 3 Inorganic Chemistry,Egon Wiberg, Arnold Frederick Holleman Elsevier 2001 ISBN 0-12-352651-5

Tellurium compounds

Te₂Br TeBr₄ Te₃Cl₂ TeCl₄ TeF₄ TeF₆ TeI₄ TeO TeO₂ TeO₃ TeN

Fluorine compounds

AgF AgF₂ Ag₂F AlF₃ AmF₃ AmF₄ AsF₃ AsF₅ AuF₃ BF₃ B₂F₄ BaF₂ BeF₂ BiF₃ BiF₅ BrF₃ BrF₅ CF₄ C₂F₆ CaF₂ CdF₂ CeF₃ ClF₃ ClF₅ CoF₂ CoF₃ CrF₂ CrF₃ CrF₄ CrF₅ CrF₆ CsF CuF DyF₃ ErF₃ EuF₂ EuF₃ DF HF FI KF LiF NaF RbF TlF FeF₂ HgF₂ Hg₂F₂ KrF₂ MgF₂ MnF₂ NiF₂ F₂O F₂O₄ PbF₂ PdF₂ SnF₂ SrF₂ XeF₂ ZnF₂ ZrF₂ FeF₃ GaF₃ GdF₃ HoF₃ InF₃ LaF₃ LuF₃ MnF₃ F₃N NdF₃ F₃P PrF₃ PuF₃ SbF₃ ScF₃ SmF₃ TbF₃ TiF₃ TlF₃ TmF₃ UF₃ VF₃ YF₃ YbF₃ GeF₄ HfF₄ MoF₄ F₄N₂ PbF₄ PuF₄ SF₄ SeF₄ SiF₄ SnF₄ TeF₄ ThF₄ UF₄ VF₄ WF₄ XeF₄ ZrF₄ IF₅ NbF₅ PF₅ SbF₅ TaF₅ UF₅ VF₅ WF₅ MoF₆ OsF₆ PtF₆ ReF₆ SF₆ SeF₆ TeF₆ UF₆ WF₆ XeF₆ IF₇ ReF₇ IrF₃ IrF₆ OsF₄ OsF₅ PmF₃ PrF₄ PuF₆ ReF₄ ReF₅ RhF₆ RuF₃ RuF₄ RuF₅ RuF₆ TcF₅ TcF₆ VF₂ YbF₂ AgBF₄ AgPF₆ Cs₂AlF₅ K₃AlF₆ Na₃AlF₆ KAsF₆ LiAsF₆ NaAsF₆ HBF₄ KBF₄ LiBF₄ NaBF₄ RbBF₄ Ba(BF₄)₂ Ni(BF₄)₂ Pb(BF₄)₂ Sn(BF₄)₂ BaClF BaSiF₆ BaGeF₆ BrOF₃ BrO₂F CBrF₃ CBr₂F₂ CBr₃F CClF₃ CCl₂F₂ CCl₃F CFN CF₂O CF₃I CHF₃ CH₂F₂ CH₃F C₂Cl₃F₃ C₂H₃F C₆H₅F C₇H₅F₃ C₁₅F₃₃N ClFO₂ CrFO₄ CrF₂O₂ CsBF₄ NH₄F FNO FNO₂ FNO₃ KHF₂ NaHF₂ ThOF₂ NH₅F₂ F₂OS F₃OP F₃PS HPF₆ HSbF₆ KPF₆ KSbF₆ LiPF₆ NaPF₆ NaSbF₆ Na₂SiF₆ Na₂TiF₆ Na₂ZrF₆ TlPF₆ IOF₃ K₂NbF₇ K₂TaF₇ IO₃F

Chemical formulas

This article is issued from Wikipedia - version of the 7/4/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.