Tetrafluoroborates
Tetrafluoroborates are chemical compounds that contain the anion BF 4 - . They represent the salts of tetrafluoroboric acid HBF 4 . The boron is in the +3 oxidation state.
Extraction and presentation
The tetrafluoroborates can result from the reaction with a base .
- Sodium hydroxide and tetrafluoroboric acid react to form sodium tetrafluoroborate and water .
- Copper (II) oxide and tetrafluoroboric acid react to form copper (II) tetrafluoroborate and water .
properties
The tetrafluoroborates are mostly odorless, white powders. They are readily soluble in water, with the exception of potassium tetrafluoroborate . Many tetrafluoroborate salts are corrosive and in some cases harmful to health or the environment.
use
The salts have various uses. Silver tetrafluoroborate is used as a catalyst for nitration, acylation and sulfonation. Copper (II) tetrafluoroborate is used for the production of copper complexes .
Individual evidence
- ↑ Herbert W. Roesky: Efficient Preparations of Fluorine Compounds . John Wiley & Sons, 2012, ISBN 1-118-40942-6 , pp. 43 ( limited preview in Google Book search).