Tetrafluoroammonium
2D model of the tetrafluoroammonium ion | |
| Names | |
|---|---|
| IUPAC name
Tetrafluoroammonium | |
| Identifiers | |
3D model (JSmol) |
|
| ChEBI | |
| ChemSpider | |
| 2028 | |
PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| F4N+ | |
| Molar mass | 90.000 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
The tetrafluoroammonium cation (also known as perfluoroammonium) is a positively charged polyatomic ion with chemical formula NF+
4. It is equivalent to the ammonium ion where the hydrogen atoms surrounding the central nitrogen atom have been replaced by fluorine. Tetrafluoroammonium ion is isoelectronic with tetrafluoromethane CF
4, trifluoramine oxide ONF
3, tetrafluoroborate BF−
4 anion and the tetrafluoroberyllate BeF2−
4 anion.
The tetrafluoroammonium ion forms salts with a large variety of fluorine-bearing anions. These include the bifluoride anion (HF−
2), tetrafluorobromate (BrF−
4), metal pentafluorides (MF−
5 where M is Ge, Sn, or Ti), hexafluorides (MF−
6 where M is P, As, Sb, Bi, or Pt), heptafluorides (MF−
7 where M is W, U, or Xe), octafluorides (XeF2−
8), various oxyfluorides (MF
5O−
where M is W or U; FSO−
3, BrF
4O−
), and perchlorate (ClO−
4). Attempts to make the nitrate salt, NF
4NO
3, were unsuccessful because of quick fluorination: NF+
4 + NO−
3 → NF
3 + FONO
2.