Vanadium(III) fluoride
Vanadium fluoride is the chemical compound with the formula VF3. This yellow-green, refractory solid is obtained in a two-step procedure from V2O3.
Similar to other transition-metal fluorides, it exhibits magnetic ordering at low temperatures.Preparation
The first step entails conversion to the hexafluorovanadate salt using ammonium bifluoride:
In the second step, the hexafluorovanadate is thermally decomposed.
The thermal decomposition of ammonium salts is a relatively common method for the preparation of inorganic solids.
VF3 can also be prepared by treatment of V2O3 with HF.
VF3 is a crystalline solid with 6 coordinate vanadium atoms with bridging fluorine atoms. The magnetic moment indicates the presence of two unpaired electrons.
