Hexafluorophosphoric acid
| Names | |
|---|---|
| IUPAC name
Hydrogen hexafluorophosphate | |
| Other names
Hexafluorophosphoric acid | |
| Identifiers | |
16940-81-1  | |
| ChemSpider | 17339451  |
| EC number | 241-006-5 |
| |
| Jmol-3D images | Image |
| PubChem | 16211447 |
| |
| Properties | |
| HPF6 | |
| Molar mass | 145.972 g/mol |
| Appearance | colorless oily liquid |
| Melting point | decomposes at 25°C |
| reacts | |
| Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | |
| verify (what is: /?) | |
| Infobox references | |
Hexafluorophosphoric acid is the chemical compound with the chemical formula H3OPF6. This strong Brønsted acid features a non-coordinating anion, hexafluorophosphate (PF−
6). It is formed from the reaction of hydrogen fluoride with phosphorus pentafluoride.[2]
Like many strong acids, hexafluorophosphoric acid is not isolable but is handled only in solution. Its aqueous solutions consist of hydronium ion, H
3O+
, and PF−
6. Additionally, such solutions contain products derived from hydrolysis of the P-F bonds, including HPO
2F
2, H
2PO
2F, and H
3PO
4, and their conjugate bases.[3] Hexafluorophosphoric acid is known to vigorously attack glass, and decomposes to generate HF.
"Crystalline HPF
6" has been obtained as the hexahydrate, wherein PF−
6 is enclosed in truncated octahedral cages defined by the water and protons. NMR spectroscopy indicates that solutions derived from this hexahydrate contain significant amounts of HF.[3]
See also
References
- ↑ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 4–74. ISBN 0-8493-0594-2.
- ↑ Arpad Molnar; G. K. Surya Prakash; Jean Sommer (2009). Superacid Chemistry (2nd ed.). Wiley-Interscience. p. 44. ISBN 0-471-59668-X.
- ↑ 3.0 3.1 D. W. Davidson; S. K. Garg (May 1972). "The Hydrate of Hexafluorophosphoric Acid". Canadian Journal of Chemistry 50: 3515–3520. doi:10.1139/v72-565.