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Properties of substance:

iron tetracarbonyl dihydride

Group of substances:

inorganic

Physical appearance:

colorless liquid

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

C4H2FeO4

Structural formula as text:

H2[Fe(CO)4]

Molar/atomic mass: 169.9

Melting point (°C):

-70.2

Decomposition temperature (°C):

-10

Solubility (g/100 g of solvent):

benzene: very soluble [Ref.]
diethyl ether: very soluble [Ref.]
water: 0.0187 (0°C) [Ref.]
water: 0.0306 (17.5°C) [Ref.]

Numerical data:

Year of discovery: 1931

Density:

1.596 (-70°C, d4)

Reactions of synthesis:

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

Dissociation:

pKa (1) = 4.4 (20°C, water)
pKa (1) = 11.4 (25°C, acetonitrile)
pKa (2) = 13.4 (20°C, water)

References:

  1. Nicholls D. The chemistry of iron, cobalt and nickel. - Pergamon Press, 1973. - pp. 998
  2. Белозерский Н.А. Карбонилы металлов. - М.: ГНТИЛЧЦМ, 1958. - pp. 86-93 [Russian]
  3. Коллмен Дж., Хигедас Л., Нортон Дж., Финке Р. Металлорганическая химия переходных металлов. - Кн.1. - М.: Мир, 1989. - pp. 96 [Russian]
  4. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 347 [Russian]
  5. Рипан Р., Четяну И. Неорганическая химия. - Т.2. - М.: Мир, 1972. - pp. 535-536 [Russian]
  6. Химия металлорганических соединений. - Под ред. Цейсса Г. - М.: Мир, 1964. - pp. 574 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru