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Boron trifluoride - Preparation, Properties, Structure, Uses | Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail |

Chapter: 12th Chemistry : p-Block Elements-I

Boron trifluoride

Chemistry : p-Block Elements-I: Preparation of Boron trifluoride, Properties of Boron trifluoride, Structure of Boron trifluoride, Uses of Boron trifluoride

Boron trifluoride:


Preparation:

Boron trifuloride is obtained by the treatment of calcium fluoride with boron trioxide in presence of conc. sulphuric acid.


It can also be obtained by treating boron trioxide with carbon and fluorine.

B2O3 + 3C + 3F2  → 2BF3 + 3CO

In the laboratory pure BF3 is prepared by the thermal decomposition of benzene diazonium tetrafluoro borate.



Properties:

Boron trifluoride has a planar geometry. It is an electron deficient compound and accepts electron pairs to form coordinate covalent bonds. They form complex of the type [BX4]-.

BF3 + NH3  → F3 ← B NH3

BF3 + H2O → F3B ← OH2

On hydrolysis, boric acid is obtained. This then gets converted into fluoro boric acid.



Uses of Boron trifluoride:

·           Boron trifluoride is used for preparing HBF4, a catalyst in organic chemistry

·           It is also used as a fluorinating reagent.

 

Tags : Preparation, Properties, Structure, Uses Preparation, Properties, Structure, Uses
Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail


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