Hydrogen Tetracarbonylferrate(II)
Title: Hydrogen Tetracarbonylferrate(II)
CAS Registry Number: 17440-90-3
CAS Name: (T-4)-Dihydrogen tetracarbonylferrate(2-)
Additional Names: iron hydrocarbonyl; iron tetracarbonyl dihydride
Molecular Formula: C4H2FeO4
Molecular Weight: 169.90
Percent Composition: C 28.28%, H 1.19%, Fe 32.87%, O 37.67%
Line Formula: H2Fe(CO)4
Literature References: Prepn from Fe(CO)5: Blanchard, Coleman, Inorg. Synth. 2, 243 (1946); Sternberg et al., J. Am. Chem. Soc. 79, 6116 (1957); Bishop et al., J. Chem. Soc. 1959, 2484.
Properties: Colorless crystals, mp -70°; colorless liq, very unstable, dec below -10° on exposure to air. Slight traces of iron carbonyls impart a red or yellow color. Gas has extremely nauseating odor. Sol in alkalies; neutral aq solns of salts unstable at room temp; strongly alkaline solns of salts, e.g. K2Fe(CO)4, are stable at room temp when all traces of air are excluded but dec gradually at 100° to CO and H2.
Melting point: mp -70°
Status: This monograph has been retired and is no longer subject to revision or update.

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