Niobium(IV) fluoride

Niobium(IV) fluoride
IUPAC name

Niobium(IV) fluoride
Identifiers
CAS number 13842-88-1 Y
Properties
Molecular formula NbF4
Molar mass 168.9 g/mol
Appearance black solid
Melting point

350 °C(decompose)
 Y (verify) (what is: Y/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Niobium(IV) fluoride is a chemical compound with the formula NbF4; it is a nonvolatile black solid. It absorbs vapor strongly. It turns into NbO2F in moist air. NbF4 reacts with water strongly to form brown solution and brown precipitate whose components are unknown. It is stable between 275℃ and 325℃ when heating NbF4 in vacuum. However, it takes disproportionating reaction over 350℃ rapidly to form niobium(V) fluoride and niobium(III) fluoride:

\mathrm{\ 2 NbF_4 \rightarrow NbF_5 %2B NbF_3}(at 350℃)[1]

References

  1. ^ 张青莲 (1981). 无机化学丛书. Beijing: Science Press. pp. 323. ISBN 7-03-002238-6.