Teflic acid
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| Template:Longitem | Template:Chem2 |
| Molar mass | Template:Chem molar mass |
| Appearance | colorless solid |
| Melting point | Template:Chembox CalcTemperatures |
| Boiling point | Template:Chembox CalcTemperatures |
| Acidity (pKa) | 8.8 (in Ac2O)[1] |
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Teflic acid is a chemical compound with the formula Template:Chem2. This strong acid is related to orthotelluric acid, Template:Chem2. Teflic acid has a slightly distorted octahedral molecular geometry.
Preparation
Teflic acid was accidentally discovered by Engelbrecht and Sladky. Their synthesis did not yield the anticipated telluryl fluoride Template:Chem2, but a mixture of volatile telluric compounds, containing Template:Chem2:[2]
- Template:Chem2 (25%)
Teflic acid can also be prepared from fluorosulfonic acid and barium tellurate:[3]
It is also the first hydrolysis product of tellurium hexafluoride:
Teflates
The conjugate base of teflic acid is called the teflate anion, Template:Chem2 (not to be confused with triflate). Many teflates are known, one example being Template:Chem2, that can be pyrolysed to give acid anhydride Template:Chem2.[3]
The teflate anion is known to resist oxidation. This property has allowed the preparation several highly unusual species such as the hexateflates Template:Chem2 (in which M = As, Sb, Bi). Xenon forms the cation Template:Chem2.[4]
References
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- ↑ Script error: No such module "citation/CS1".
- ↑ Engelbrecht, A.; Sladky, F. "Pentafluoro-orthotellursaure, Template:Chem2" Angewandte Chemie 1964. 76(9), 379-380, Script error: No such module "CS1 identifiers"..
- ↑ a b Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. Template:ISBN.
- ↑ Mercier, H. P.A.; Sanders, J. C. P.; Schrobilgen, G. J. "The Hexakis(pentafluorooxotellurato)pnictate(V) Anions, Template:Chem2 (M = As, Sb, Bi): A Series of Very Weakly Coordinating Anions" Journal of the American Chemical Society, volume 116, 2921, (1994). Script error: No such module "CS1 identifiers"..
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Further reading
- R.B. King; Inorganic Chemistry of Main Group Elements, VCH Publishers, New York,1994.
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