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Properties of substance:

chlorine(I) fluoride

Group of substances:

inorganic

Physical appearance:

colorless gas

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

ClF

Structural formula as text:

ClF

Molar/atomic mass: 54.45

Melting point (°C):

-155.5

Boiling point (°C):

-100.1

Solubility (g/100 g of solvent):

water: reaction [Ref.]

Numerical data:

Year of discovery: 1928

Density:

1.67 (-108°C, g/cm3)

Reactions of synthesis:

  1. Yeild 90%. [Ref.1, Ref.2]
    Cl2 + F2 → 2ClF
  2. Yeild 18,5%. [Ref.1]
    Cl2 + AgF → ClF + AgCl
  3. Yeild 71%. [Ref.1, Ref.2aster]
    ClOSO2F + CsF → ClF + CsOSO2F
  4. Yeild 95%. [Ref.1]
    ClF3 + Cl2 → 3ClF

Reactions:

  1. Yeild 85-95%. [Ref.1aster]
    ClF + HNO3 → ClNO3 + HF
  2. Yeild 99%. [Ref.1aster]
    SO2 + ClF → SO2ClF
  3. Yeild 95%. [Ref.1]
    CF3OOH + ClF → CF3OOCl + HF
  4. [Ref.1aster]
    CF3COONa + ClF → CF3COOCl + NaF
  5. [Ref.1]
    S + 4ClF → SF4 + 2Cl2
  6. [Ref.1]
    N2F[AsF6] + ClF → ClF2[AsF6] + N2

Vapour pressure (Torr):

1 (-153.5°C)
10 (-139.3°C)
100 (-121.2°C)

Dipole moment (D):

0.65 (20°C)

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

-49.9 (g)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

-51.4 (g)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

217.8 (g)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

32.09 (g)

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

22

References:

  1. Никитин И.В. Фториды и оксифториды галогенов. - М.: Наука, 1989. - pp. 5-16 [Russian]
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 109-110 [Russian]
  3. Рысс И.Г. Химия фтора и его неорганических соединений. - М., 1956. - pp. 126-127 [Russian]
  4. Фиалков Я.А. Межгалоидные соединения. - Киев: Издательство АН Украинской ССР, 1958. - pp. 20-29 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru