Main page (Russian)
Search in database (English)
Properties of substance:
dichlorine heptoxide
Group of substances:
inorganic
Physical appearance:
colorless oily liquid
Empirical formula (Hill's system for organic substances):
Cl
2
O
7
Structural formula as text:
Cl2O7
Molar/atomic mass: 182.9
Melting point (°C):
-90
Boiling point (°C):
80
Decomposition temperature (°C):
80
Solubility (g/100 g of solvent):
benzene
: soluble [
Ref.
]
carbon tetrachloride
: miscible (-22°C) [
Ref.
]
perchloric acid anhydrous
: miscible (20°C) [
Ref.
]
phosphorus(V) trichloride oxide
: soluble [
Ref.
]
water
: reaction [
Ref.
]
Interatomic distances and bond angles:
Interatomic distances (in pm): 142 (O(1)-Cl)
Interatomic distances (in pm): 172,5 (Cl-O(4))
Bond angles (in degrees): 115 (Cl-O(4)-Cl)
Numerical data:
Year of discovery: 1900
Density:
1.967 (-50°C, g/cm
3
)
1.9 (-20°C, g/cm
3
)
1.855 (0°C, g/cm
3
)
1.811 (20°C, g/cm
3
)
1.8053 (25°C, g/cm
3
)
Reactions of synthesis:
[
Ref.1
]
2HClO
4
+ P
2
O
5
→ Cl
2
O
7
+ 2HPO
3
Reactions:
Yeild 56%. [
Ref.1
,
Ref.2
]
C
2
H
5
OH + Cl
2
O
7
→ C
2
H
5
OClO
3
+ HClO
4
Yeild 60%. [
Ref.1
,
Ref.2
]
HOCH
2
CH
2
OH + 2Cl
2
O
7
→ O
3
ClOCH
2
CH
2
OClO
3
+ 2HClO
4
Yeild 83%. [
Ref.1
]
(CH
2
)
4
O + Cl
2
O
7
→ O
3
ClOCH
2
CH
2
CH
2
CH
2
OClO
3
[
Ref.1
]
3H
2
NCOOC
2
H
5
+ Cl
2
O
7
→ C
2
H
5
OClO
3
+ [H
2
NC(OH)OC
2
H
5
]ClO
4
+ H
2
NCONHCOOC
2
H
5
Vapour pressure (Torr):
1 (-47°C)
10 (-14.6°C)
100 (28.3°C)
Dipole moment (D):
0.72 (20°C)
Viscosity (mPa·s):
0.698 (20°C)
0.867 (0°C)
0.975 (-10°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
251 (l)
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
32.3
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
285 (g)
References:
Advances in Inorganic Chemistry and Radiochemistry. - 1963. - Vol. 5. - pp. 70
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 265 [Russian]
Никитин И.В. Химия кислородных соединений галогенов. - М.: Наука, 1986. - pp. 78-82 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 109 [Russian]
Реми Г. Курс неорганической химии. - Т.1. - М., 1963. - pp. 862-863 [Russian]
Росоловский В.Я. Химия безводной хлорной кислоты. - М.: Наука, 1966. - pp. 115-129 [Russian]
What information do you need?
© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
]
Search in database (English)
]]]