Teflic acid

Teflic acid

Names
IUPAC name Pentafluoroorthotelluric acid
Other names Teflic acid
Identifiers
3D model (Jmol)	Interactive image
ChemSpider	10331773 Y
ECHA InfoCard	100.161.534
InChI InChI=1S/F5HOTe/c1-7(2,3,4,5)6/h6H Y Key: OAOSLENTGBMCNC-UHFFFAOYSA-N Y InChI=1/F5HOTe/c1-7(2,3,4,5)6/h6H Key: OAOSLENTGBMCNC-UHFFFAOYAO
SMILES F[Te](F)(F)(F)(F)O
Properties
Chemical formula	HF5OTe
Molar mass	239.6
Appearance	colorless solid
Melting point	39.1 °C (102.4 °F; 312.2 K)
Boiling point	59.7 °C (139.5 °F; 332.8 K)
Hazards
Main hazards	corrosive, toxic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
Infobox references

Teflic acid is the chemical compound with the formula HOTeF₅. This strong acid is related to orthotelluric acid, Te(OH)₆. Teflic acid has octahedral geometry and, Ignoring its bent Te-O-H bond, has point group symmetry C_4v.

Teflic acid can be prepared from barium tellurate and fluorosulfonic acid:

It is also the first hydrolysis product of tellurium hexafluoride:

The conjugate base of teflic acid is called the teflate anion, F₅TeO⁻ (not to be confused with triflate). Many teflates are known, examples being B(OTeF₅)₃ and the acid anhydride O(TeF₅)₂. Pyrolysis of the boron compound gives the dimer (TeF₄O)₂

The teflate anion is known to resist oxidation. This property has allowed the preparation several highly unusual species such as the hexateflates M(OTeF₅)₆⁻ (M = As, Sb, Bi). Xenon forms the cation Xe(OTeF₅)⁺,