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Properties of substance:

iron pentacarbonyl



skc-file

Group of substances:

inorganic

Physical appearance:

liquid

Empirical formula (Hill's system for organic substances):

C5FeO5

Structural formula as text:

Fe(CO)5

Molar/atomic mass: 195.9

Melting point (°C):

-21

Boiling point (°C):

105

Decomposition temperature (°C):

130

Solubility (g/100 g of solvent):

acetaldehyde: moderately soluble [Ref.]
acetic acid: miscible [Ref.]
acetone: soluble [Ref.]
amyl alcohol: miscible [Ref.]
benzaldehyde: miscible [Ref.]
benzene: soluble [Ref.]
benzine: soluble [Ref.]
bromobenzene: miscible [Ref.]
butyric acid: moderately soluble [Ref.]
carbon disulphide: miscible [Ref.]
carbon tetrachloride: miscible [Ref.]
chloroform: very slightly soluble [Ref.]
diethyl ether: soluble [Ref.]
ethanol: soluble [Ref.]
ethyl acetate: miscible [Ref.]
formamide: very slightly soluble [Ref.]
tetraline: miscible [Ref.]
water: insoluble [Ref.]

Interatomic distances and bond angles:

Interatomic distances (in pm): 115 (C-O)
Interatomic distances (in pm): 184 (Fe-C)

Numerical data:

Year of discovery: 1891

Density:

1.53 (-20°C, g/cm3)
1.493 (0°C, g/cm3)
1.474 (13.4°C, g/cm3)
1.47 (15.5°C, g/cm3)
1.468 (16.5°C, g/cm3)
1.462 (19°C, g/cm3)
1.453 (20°C, g/cm3)
1.456 (21.1°C, g/cm3)
1.46 (22°C, g/cm3)
1.421 (40°C, g/cm3)
1.382 (60°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1]
    Fe + 5CO → Fe(CO)5

Reactions:

  1. [Ref.1aster]
    Fe(CO)5 + 3NaOH → NaH[Fe(CO)4] + Na2CO3 + H2O
    2NaH[Fe(CO)4] + H2SO4 → 2H2[Fe(CO)4] + Na2SO4
  2. [Ref.1]
    Fe(CO)5 + H2SO4 → FeSO4 + 5CO + H2

Vapour pressure (Torr):

10 (4.7°C)
28 (18°C)
100 (50.3°C)

Permittivity (dielectric constant):

2.6 (20°C)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-764 (l)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

-695.2 (l)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

338 (l)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

240.6 (l)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-723.8 (g)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

445 (g)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

168 (g)

LD50 (mg/kg):

1.75 (rabbits, oral)
1.75 (rabbits, intravenous)

References:

  1. Bell C.F. Syntheses and Physical Studies of Inorganic Compounds. - Pergamon Press, 1972. - pp. 169-175
  2. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 12ed., Vol. 1-5. - Wiley, 2012. - pp. 2595-2596
  3. The Merck Index 11th ed., Merck & Company, 1989. - pp. 806
  4. Белозерский Н.А. Карбонилы металлов. - М.: ГНТИЛЧЦМ, 1958. - pp. 46-134 [Russian]
  5. Волков В.Л., Сыркин В.Г., Толмасский И.С. Карбонильное железо. - М.: Металлургия, 1969. - pp. 27-34 [Russian]
  6. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 529 [Russian]
  7. Гринвуд Н., Эрншо А. Химия элементов. - Т.2. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 432 [Russian]
  8. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 345-346 [Russian]
  9. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 63 [Russian]
  10. Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 130 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru