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Properties of substance:
molybdenum(VI) fluoride
Group of substances:
inorganic
Physical appearance:
colorless liquid
Empirical formula (Hill's system for organic substances):
F
6
Mo
Structural formula as text:
MoF6
Molar/atomic mass: 209.93
Melting point (°C):
17.6
Boiling point (°C):
33.9
Solubility (g/100 g of solvent):
hydrogen fluoride
: 16.66 (0°C) [
Ref.
]
sulfuric acid
: sparingly soluble [
Ref.
]
Density:
2.55 (17.5°C, g/cm
3
)
Reactions of synthesis:
[
Ref.1
,
Ref.2
]
Mo + 3F
2
→ MoF
6
Vapour pressure (Torr):
1 (-67°C)
10 (-41.2°C)
100 (-8.2°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-1585.4 (l)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-1473 (l)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
259.7 (l)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
169.8 (l)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
4.33
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
27.25
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-1557.7 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
351 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
120.5 (g)
References:
Houben-Weyl Methods in Organic Chemistry. - vol.E-10a: ORGANOFLUORINE COMPOUNDS. - Thieme Verlag, Stuttgart, 1998. - pp. 679-681
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 374 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 82 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru