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Properties of substance:
phosphorus(III) fluoride
Synonyms:
trifluorophosphine
Group of substances:
inorganic
Physical appearance:
colorless gas
Empirical formula (Hill's system for organic substances):
F
3
P
Structural formula as text:
PF3
Molar/atomic mass: 87.97
Melting point (°C):
-151.5
Boiling point (°C):
-101.4
Solubility (g/100 g of solvent):
ethanol
: soluble [
Ref.
]
hydrogen chloride liquid anhydrous
: soluble [
Ref.
]
sulfuric acid
: soluble [
Ref.
]
water
: reaction [
Ref.
]
Numerical data:
Year of discovery: 1884
Density:
0.003907 (20°C, g/cm
3
)
Reactions:
Yeild 90-100%. [
Ref.1
]
Ni + 4PF
3
→ Ni(PF
3
)
4
[
Ref.1
]
(CH
3
)
4
NF + PF
3
→ (CH
3
)
4
NPF
4
Vapour pressure (Torr):
10 (-150°C)
100 (-128°C)
Dipole moment (D):
1.03 (20°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-956.5 (g)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-935.66 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
272.6 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
58.7 (g)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
0.937
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
14.58
Critical temperature (°C):
-2.05
Critical pressure (MPa):
4.326
References:
Advances in Inorganic Chemistry and Radiochemistry. - 1970. - Vol. 13. - pp. 364-367
Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 463 [Russian]
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 454 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 108 [Russian]
Рысс И.Г. Химия фтора и его неорганических соединений. - М., 1956. - pp. 235-240 [Russian]
Фтор и его соединения. – Под ред. Саймонса Дж., Т. 1. - М.: ИИЛ, 1953. - pp. 88-89 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru