Английская Википедия:Fluorine azide

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Шаблон:Chembox Fluorine azide or triazadienyl fluoride is a yellow green gas composed of nitrogen and fluorine with formula Шаблон:Chem2.[1] Its properties resemble those of [[Chlorine azide|Шаблон:Chem2]], [[Bromine azide|Шаблон:Chem2]], and [[Iodine azide|Шаблон:Chem2]].[2] The bond between the fluorine atom and the nitrogen is very weak, leading to this substance being very unstable and prone to explosion.[3] Calculations show the F–N–N angle to be around 102° with a straight line of 3 nitrogen atoms.[4]

The gas boils at –30° and melts at –139 °C.[5]

It was first made by John F. Haller in 1942.[6]

Reactions

Fluorine azide can be made by reacting hydrazoic acid or sodium azide, with fluorine gas.[5][7]

Шаблон:Chem2
Шаблон:Chem2

Fluorine azide decomposes without explosion at normal temperatures to make dinitrogen difluoride:

Шаблон:Chem2.[1]

At higher temperatures such as 1000 °C fluorine azide breaks up into nitrogen monofluoride radical:[7]

Шаблон:Chem2

The FN itself dimerizes on cooling.

Шаблон:Chem2

Solid or liquid Шаблон:Chem2 can explode, releasing a large amount of energy. A thin film burns at the rate of 1.6 km/s.[8] Due to the explosion hazard, only very small quantities of this substance should be handled at a time.[9]

Шаблон:Chem2 adducts can be formed with the Lewis acids boron trifluoride (Шаблон:Chem2) and arsenic pentafluoride (Шаблон:Chem2) at -196 °C. These molecules bond with the Nα atom.[10]

Properties

Spectroscopy

Parameter Value[9] Unit
A 48131.448 MHz
B 5713.266 MHz
C 5095.276 MHz
μa 1.1
μb 0.7

Shape

Distances between atoms are F–N 0.1444 nm, FN=NN 0.1253 nm and FNN=N 0.1132 nm.[9]

Physical

Шаблон:Chem2 has a density of 1.3 g/cm3.[11]

Шаблон:Chem2 adsorbs on to solid surfaces of potassium fluoride, but not onto lithium fluoride or sodium fluoride. This property was being investigated so that Шаблон:Chem2 could boost the energy of solid propellants.[11]

The ultraviolet photoelectric spectrum shows ionisation peaks at 11.01, 13,72, 15.6, 15.9, 16.67, 18.2, and 19.7 eV. Respectively these are assigned to the orbitals: π, nN or nF, nF, πF, nN or σ, π and σ.[3]

References

Шаблон:Reflist

External links

Шаблон:Fluorine compounds Шаблон:Nitrogen compounds Шаблон:Azides

Партнерские ресурсы
Криптовалюты
Магазины
Хостинг
Разное

  1. ↑ 1,0 1,1 Шаблон:Cite journal
  2. ↑ Шаблон:Cite book
  3. ↑ 3,0 3,1 Шаблон:Cite journal
  4. ↑ Шаблон:Cite journal
  5. ↑ 5,0 5,1 Шаблон:Cite journal
  6. ↑ Шаблон:Cite web
  7. ↑ 7,0 7,1 Шаблон:Cite journal
  8. ↑ Шаблон:Cite journal
  9. ↑ 9,0 9,1 9,2 Шаблон:Cite journal
  10. ↑ Шаблон:Cite journal
  11. ↑ 11,0 11,1 Шаблон:Cite book
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