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Properties of substance:

hypofluorous acid

Group of substances:

inorganic

Physical appearance:

liquid

Empirical formula (Hill's system for organic substances):

HFO

Structural formula as text:

HOF

Molar/atomic mass: 36.006

Melting point (°C):

-117

Boiling point (°C):

19

Decomposition temperature (°C):

20

Interatomic distances and bond angles:

Interatomic distances (in pm): 78 (H-O) [crystals]
Interatomic distances (in pm): 144,2 (O-F) [crystals]
Interatomic distances (in pm): 96,4 (H-O) [gas]
Interatomic distances (in pm): 144,2 (O-F) [gas]
Bond angles (in degrees): 101 (H-O-F) [crystals]
Bond angles (in degrees): 97 (H-O-F) [gas]

Numerical data:

Year of discovery: 1968

Reactions:

  1. [Ref.1]
    2HOF → 2HF + O2

Vapour pressure (Torr):

1 (-79°C)
5 (-64°C)

Electrode potential:

HOF + 2H+ + 2e- → H2O + HF, E = 2.35 V (water, 25°C)

Dipole moment (D):

2.23 (20°C)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-98.3 (l)

References:

  1. Chemical Reviews. - 1996. - vol. 96, No. 5. - pp. 1732
  2. Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 593 [Russian]
  3. Гринвуд Н., Эрншо А. Химия элементов. - Т.2. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 201 [Russian]
  4. Карапетьянц М.Х., Дракин С.И. Общая и неорганическая химия. - М.: Химия, 1981. - pp. 484 [Russian]
  5. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 242 [Russian]
  6. Степин Б.Д., Цветков А.А. Неорганическая химия. - М.: Высшая школа, 1994. - pp. 323 [Russian]
  7. Успехи химии. - 2004. - Т.73, №6. - pp. 662-665 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru