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Properties of substance:
chromium(VI) dichloride dioxide
Synonyms:
chromyl chloride
Group of substances:
inorganic
Physical appearance:
liquid
Empirical formula (Hill's system for organic substances):
Cl
2
CrO
2
Structural formula as text:
CrO2Cl2
Molar/atomic mass: 154.9
Melting point (°C):
-95
Boiling point (°C):
116
Decomposition temperature (°C):
180
Solubility (g/100 g of solvent):
1,2-dibromoethane
: miscible [
Ref.
]
1,2-dichloroethane
: miscible [
Ref.
]
1-butanol
: reaction [
Ref.
]
2-ethyl-1-hexanol
: ignites [
Ref.
]
2-propanol
: ignites [
Ref.
]
acetic acid
: miscible with slow reaction [
Ref.
]
acetic anhydride
: miscible with slow reaction [
Ref.
]
acetyl bromide
: reaction [
Ref.
]
acetyl chloride
: miscible [
Ref.
]
aniline
: reaction [
Ref.
]
benzene
: miscible with slow reaction [
Ref.
]
carbon disulphide
: miscible with slow reaction [
Ref.
]
carbon tetrachloride
: miscible [
Ref.
]
chloroform
: soluble [
Ref.
]
cyclohexane
: miscible with slow reaction [
Ref.
]
cyclohexanol
: ignites [
Ref.
]
cyclohexylamine
: reaction [
Ref.
]
dicyclohexylamine
: reaction [
Ref.
]
diethyl ether
: soluble [
Ref.
]
ethanol
: reaction [
Ref.
]
ethylene glycol
: ignites [
Ref.
]
formic acid 100%
: insoluble [
Ref.
]
hexane
: miscible with slow reaction [
Ref.
]
hydrogen fluoride
: insoluble [
Ref.
]
mercury
: insoluble [
Ref.
]
methanol
: reaction [
Ref.
]
methylene chloride
: miscible [
Ref.
]
nitric acid 100%
: miscible with slow reaction [
Ref.
]
nitrobenzene
: miscible with slow reaction [
Ref.
]
oil of turpentine: ignites [
Ref.
]
p-cymene
: reaction [
Ref.
]
phosphoric acid 85%
: insoluble [
Ref.
]
phosphorus(V) trichloride oxide
: soluble [
Ref.
]
pyridine
: reaction [
Ref.
]
sulfuric acid 70%
: insoluble [
Ref.
]
tert-butylamine
: reaction [
Ref.
]
thionyl chloride
: miscible [
Ref.
]
tin tetrachloride
: miscible [
Ref.
]
toluene
: reaction [
Ref.
]
triethanolamine
: reaction [
Ref.
]
water
: reaction [
Ref.
]
xylene: reaction [
Ref.
]
Numerical data:
Year of discovery: 1824
Density:
1.911 (20°C, g/cm
3
)
Reactions of synthesis:
[
Ref.1
]
K
2
Cr
2
O
7
+ 4NaCl + 3H
2
SO
4
→ 2CrO
2
Cl
2
+ K
2
SO
4
+ 2Na
2
SO
4
+ 3H
2
O
[
Ref.1
]
CrO
3
+ 2HCl → CrO
2
Cl
2
+ H
2
O
Reactions:
[
Ref.1
]
CrO
2
Cl
2
+ 2HBr → CrO
2
Br
2
+ 2HCl
Permittivity (dielectric constant):
2.6 (20°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-570.3 (l)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-528.9 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
330 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
84 (g)
Enthalpy (heat) of vaporization at boiling point Δ
vap
H (kJ/mol)
35.1 (l) [
Ref.
]
References:
CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 4-59
Chemical Reviews. - 1958. - Vol. 58, No. 1. - pp. 1-61 [DOI:
10.1021/cr50019a001
]
Реми Г. Курс неорганической химии. - Т.2. - М., 1966. - pp. 176-177 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 244-245 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru