Potassium tetracarbonyliron hydride

Potassium tetracarbonyliron hydride
Names
	Other names potassium tetracarbonylhydroferrate(1-)
Identifiers
CAS Number	17857-24-8;
3D model (JSmol)	Interactive image;
PubChem CID	13932590;
	InChI InChI=1S/4CO.Fe.K.H/c4*1-2;;;/q;;;;-1;+1; Key: ZCWNHXZCHBPQAK-UHFFFAOYSA-N;
	SMILES [C-]#[O+].[C-]#[O+].[C-]#[O+].[C-]#[O+].[K+].[Fe][H-];
Properties
Chemical formula	C4HFeKO4
Molar mass	207.991 g·mol−1
Appearance	yellow solid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Potassium tetracarbonyliron hydride is the inorganic salt with the formula K[HFe(CO)₄]. A pale yellow solid, it is the potassium salt of [HFe(CO)₄]⁻, which is the conjugate base of iron tetracarbonyl dihydride:^[1]^[2]

H₂Fe(CO)₄ + KOH → K[HFe(CO)₄] + H₂O

Potassium tetracarbonyliron hydride is prepared by treating iron pentacarbonyl with potassium hydroxide:^[3]

Fe(CO)₅ + 2 KOH → K[HFe(CO)₄] + KHCO₃

Potassium tetracarbonyliron hydride is an intermediate in the synthesis of trisubstituted phosphine complexes:^[4]

K[HFe(CO)₄] + 3 PBu₃ + EtOH → Fe(CO)₂(PBu₃)₃ + EtOK + 2 CO + H₂

References

^ Brunet, Jean-Jacques (1998). "Coordination Chemistry of Mononuclear Iron Carbonyl Complexes". Coordination Chemistry Reviews. 178–180: 331–351. doi:10.1016/S0010-8545(98)00075-7.
^ Brunet, J.J. (1990). "Tetracarbonylhydridoferrates, MHFe(CO)₄: Versatile tools in Organic Synthesis and Catalysis". Chem. Rev. 90 (6): 1041–1059. doi:10.1021/cr00104a006.
^ Brunet, J.-J.; Kindela, F. B.; Neibecker, D. (1992). "Trans-Tricarbonylbis(Phosphine)Iron(0) Complexes: One-Pot Syntheses from Pentacarbonyliron". trans-Tricarbonylbis(Phosphine)Iron(0) Complexes: One-Pot Syntheses from Pentacarbonyliron. Inorganic Syntheses. Vol. 29. pp. 151–156. doi:10.1002/9780470132609.ch36. ISBN 9780470132609.
^ Brunet, J.-J.; Kindela, F. B.; Neibecker (1996). "One-Pot Synthesis of Dicarbonyltris(Phosphane)Iron(0) Complexes from Pentacarbonyliron". Inorganic Syntheses. Inorganic Syntheses. Vol. 31. pp. 202–210. doi:10.1002/9780470132623.ch30. ISBN 9780470132623.

[1] Brunet, Jean-Jacques (1998). "Coordination Chemistry of Mononuclear Iron Carbonyl Complexes". Coordination Chemistry Reviews. 178–180: 331–351. doi:10.1016/S0010-8545(98)00075-7.

[2] Brunet, J.J. (1990). "Tetracarbonylhydridoferrates, MHFe(CO)₄: Versatile tools in Organic Synthesis and Catalysis". Chem. Rev. 90 (6): 1041–1059. doi:10.1021/cr00104a006.

[3] Brunet, J.-J.; Kindela, F. B.; Neibecker, D. (1992). "Trans-Tricarbonylbis(Phosphine)Iron(0) Complexes: One-Pot Syntheses from Pentacarbonyliron". trans-Tricarbonylbis(Phosphine)Iron(0) Complexes: One-Pot Syntheses from Pentacarbonyliron. Inorganic Syntheses. Vol. 29. pp. 151–156. doi:10.1002/9780470132609.ch36. ISBN 9780470132609.

[4] Brunet, J.-J.; Kindela, F. B.; Neibecker (1996). "One-Pot Synthesis of Dicarbonyltris(Phosphane)Iron(0) Complexes from Pentacarbonyliron". Inorganic Syntheses. Inorganic Syntheses. Vol. 31. pp. 202–210. doi:10.1002/9780470132623.ch30. ISBN 9780470132623.

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