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Properties of substance:

diborane(6)

Physical appearance:

colorless gas

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

H6B2

Structural formula as text:

B2H6

CAS No: 19287-45-7

Molar/atomic mass: 27.67

Melting point (°C):

-165

Boiling point (°C):

-92.5

Solubility (g/100 g of solvent):

water: reaction [Ref.]
diethyl ether: 1.1 (25°C) [Ref.]
carbon disulphide: soluble [Ref.]
tetrahydrofuran: 8.1 (25°C) [Ref.]

Numerical data:

Year of discovery: 1912
Interatomic distances (in pm): 133.9
Interatomic distances (in pm): 177.5
Interatomic distances (in pm): 119.6
Bond angles (in degrees): 97
Bond angles (in degrees): 119.9

Density:

0.447 (-112°C, g/cm3)
0.557 (-183°C, g/cm3)
0.001214 (25°C, g/cm3)

Vapour pressure (Torr):

10 (-146°C)
100 (-122°C)

    Dipole moment (D):

    0 (20°C)

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

    38.5 (g)

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

    89.6 (g)

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

    232 (g)

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

    56.9 (g)

    Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

    4.47

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

    13.3

    Critical temperature (°C):

    16.7

    Critical pressure (MPa):

    4

    Critical density (g/cm3):

    0.14

    References:

    1. Bell C.F. Syntheses and Physical Studies of Inorganic Compounds. - Pergamon Press, 1972. - pp. 1-15
    2. Bretherick's Handbook of Reactive Chemical Hazards. - 6 ed., Vol. 1. - Butterworth-Heinemann, 1999. - pp. 73-74
    3. Dean J.A. Lange's handbook of chemistry. - 1999. - pp. 3.20
    4. Gangolli S. The Dictionary of Substances and their Effects. - 2 ed., Vol. 3, D. - RSC, 1999. - pp. 180
    5. Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 161-164
    6. Девятых Г.Г., Зорин А.Д. Летучие неорганические гидриды особой чистоты. - М.: Наука, 1974
    7. Жигач А.Ф., Стасиневич Д.С. Химия гидридов. - Л.: Химия, 1969. - pp. 138-199
    8. Михайлов В.А. Химия бороводородов. - М.: Наука, 1967. - pp. 13-49
    9. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 20-22
    10. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 57
    11. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 38-39
    12. Успехи химии. - 1962. - Т.31, №4. - pp. 417-451
    13. Физер Л., Физер М. Реагенты для органического синтеза. - Т.1: А-Е. - М., 1970. - pp. 258-268
    14. Хайош А. Комплексные гидриды в органической химии. - Л.: Химия, 1971. - pp. 28-36
    15. Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 307
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru