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Properties of substance:
sulfur tetrafluoride
Group of substances:
inorganic
Physical appearance:
colorless gas
Empirical formula (Hill's system for organic substances):
F
4
S
Structural formula as text:
SF4
Molar/atomic mass: 108.05
Melting point (°C):
-121
Boiling point (°C):
-38
Solubility (g/100 g of solvent):
benzene
: soluble [
Ref.
]
water
: reaction [
Ref.
]
Numerical data:
Year of discovery: 1929
LCt50 (mg·min/l): 20.155
Density:
1.919 (-73°C, g/cm
3
)
Reactions of synthesis:
[
Ref.1
]
S + 4ClF → SF
4
+ 2Cl
2
Reactions:
Yeild 90%. [
Ref.1
]
CF
3
OF + SF
4
→ CF
3
OSF
5
Yeild 65%. [
Ref.1
,
Ref.2
]
H
2
NCN + SF
4
→ F
2
S=NCN + 2HF
Yeild 70%. [
Ref.1
]
12SF
4
+ 64NH
3
→ 3S
4
N
4
+ 48NH
4
F + 2N
2
Yeild 100%. [
Ref.1
]
SF
4
+ F
2
→ SF
6
Yeild 100%. [
Ref.1
]
C
6
H
5
IO
2
+ 2SF
4
→ C
6
H
5
IF
4
+ 2SOF
2
Yeild 35%. [
Ref.1
]
CH
3
CHO + SF
4
→ CH
3
CHF
2
+ SOF
2
Yeild 24%. [
Ref.1
]
H
2
NCH
2
COOH + 2SF
4
→ CF
3
CH
2
NH
2
+ 2SOF
2
+ HF
Yeild 45%. [
Ref.1
]
CH
2
=CHCOOH + 2SF
4
→ CF
3
CH=CH
2
+ 2SOF
2
+ HF
Vapour pressure (Torr):
80.8 (-73°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-770 (g)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-725.9 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
289.8 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
70.92 (g)
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
22
Critical temperature (°C):
91
References:
Bell C.F. Syntheses and Physical Studies of Inorganic Compounds. - Pergamon Press, 1972. - pp. 92-101
Journal of Fluorine Chemistry. - 1986. - Vol. 32, No. 3. - pp. 255-282
Simons J.H. Fluorine Chemistry. - Vol. 5. - New York: Academic Press, 1964. - pp. 64-67
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 97 [Russian]
Рысс И.Г. Химия фтора и его неорганических соединений. - М., 1956. - pp. 159 [Russian]
Хардин А.П., Горбунов Б.Н., Протопопов П.А. Химия четырехфтористой серы. - Издательство Саратовского университета, 1973 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru