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Properties of substance:
chlorine(I) oxide
Synonyms:
dichlorine monoxide
Group of substances:
inorganic
Physical appearance:
gas
Empirical formula (Hill's system for organic substances):
Cl
2
O
Structural formula as text:
Cl2O
Molar/atomic mass: 86.91
Melting point (°C):
-116
Boiling point (°C):
2
Solubility (g/100 g of solvent):
carbon tetrachloride
: very soluble [
Ref.
]
water
: reaction 143.6 (-9.4°C) [
Ref.
]
Interatomic distances and bond angles:
Interatomic distances (in pm): 170,038 (Cl-O) [gas]
Bond angles (in degrees): 110,96 (Cl-O-Cl) [gas]
Numerical data:
Year of discovery: 1834
Density:
0.00389 (20°C, g/cm
3
)
Reactions of synthesis:
[
Ref.1
,
Ref.2
]
2Cl
2
+ HgO → Cl
2
O + HgCl
2
Reactions:
[
Ref.1
]
Cl
2
O + 2NO
2
→ ClONO
2
+ ClNO
2
[
Ref.1
]
Cl
2
O + N
2
O
5
→ 2ClNO
3
Vapour pressure (Torr):
1 (-99°C)
10 (-73°C)
100 (-39°C)
Dipole moment (D):
1.69 (20°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
75.7 (g)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
93.4 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
266.2 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
45.4 (g)
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
25.9
References:
Advances in Inorganic Chemistry and Radiochemistry. - 1963. - Vol. 5. - pp. 47-52
Гринвуд Н., Эрншо А. Химия элементов. - Т.2. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 190-192 [Russian]
Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 210-211 [Russian]
Никитин И.В. Химия кислородных соединений галогенов. - М.: Наука, 1986. - pp. 40-60 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 109 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 344 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 240-241 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru