Niobium(IV) fluoride

Properties

absorbs vapor strongly and turns into in moist air. It reacts with water to form a brown solution and a brown precipitate whose components are unknown. It is stable between 275 °C and 325 °C when heated in a vacuum. However, it disproportionates at 350 °C rapidly to form niobium(V) fluoride and niobium(III) fluoride:

: (at 350 °C)

Structure

Niobium(IV) fluoride adopts a crystal structure analogous to that of tin(IV) fluoride, in which each niobium atom is surrounded by six fluorine atoms forming an octahedron. Of the six fluorine atoms surrounding a single niobium atom, four are bridging to adjacent octahedra, leading to a structure of octahedra connected in layers.

References

References

1. (29 July 2016). "Redetermination of the crystal structure of NbF4". Acta Crystallographica Section E.
2. 张青莲. (1981). "无机化学丛书". Science Press.