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Properties of substance:

disilane

Group of substances:

inorganic

Physical appearance:

colorless gas

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

H6Si2

Structural formula as text:

Si2H6

Molar/atomic mass: 62.22

Melting point (°C):

-131

Boiling point (°C):

-14.5

Decomposition temperature (°C):

300

Solubility (g/100 g of solvent):

benzine: soluble [Ref.]
carbon disulphide: soluble [Ref.]
ethanol: soluble [Ref.]
water: reaction [Ref.]

Numerical data:

Polarizability of molecules (nm3): 0.0111

Density:

0.686 (-25°C, g/cm3)
0.00285 (0°C, g/cm3)

Vapour pressure (Torr):

1 (-111.3°C)
10 (-88.4°C)
100 (-56.5°C)

Permittivity (dielectric constant):

1.00354 (25°C)

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

75 (g)

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

126.1 (g)

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

274.6 (g)

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

79 (g)

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

21.3

References:

  1. Андрианов К.А. Кремнийорганические соединения. - М.: ГНТИХЛ, 1955. - pp. 44 [Russian]
  2. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 604-605 [Russian]
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 75 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru