Iron pentacarbonyl
- Formula: C5FeO5
- Molecular weight: 195.895
- IUPAC Standard InChIKey: FYOFOKCECDGJBF-UHFFFAOYSA-N
- CAS Registry Number: 13463-40-6
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Iron carbonyl (Fe(CO)5), (TB-5-11)-; Iron carbonyl (Fe(CO)5); Pentacarbonyl iron; Fe(CO)5; Iron carbonyl
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
MS - José A. Martinho Simões
B - John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
(g) = C4FeO4 (g) + (g)
By formula: C5FeO5 (g) = C4FeO4 (g) + CO (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 41.5 ± 3.0 | kcal/mol | LPHP | Lewis, Golden, et al., 1984 | Please also see Smith and Laine, 1981. Temperature range: 670-780 K. The reaction enthalpy at 298 K relies on an activation energy of 40.01 kcal/mol and assumes a negligible activation barrier for product recombination. The enthalpy of formation relies on -173.0 ± 1.6 kcal/mol for the enthalpy of formation of Fe(CO)5(g). At least two other estimates of the activation energy for the Fe(CO)4(g) + CO(g) recombination have been reported: 1.7 kcal/mol Miller and Grant, 1985 and 3.99 kcal/mol Walsh, 1986. In Lewis, Golden, et al., 1984 authors have considered that the Fe(CO)4(g) fragment is in its singlet excited state. However, it has also been suggested that the fragment is formed in its triplet ground state Ray, Brandow, et al., 1988 Sunderlin, Wang, et al., 1992; MS |
ΔrH° | 55. ± 11. | kcal/mol | N/A | Engelking and Lineberger, 1979 | Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS |
By formula: HO- + C5FeO5 = (HO- • C5FeO5)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 60.8 ± 3.4 | kcal/mol | IMRE | Sunderlin and Squires, 1993 | gas phase; HO- transfer equilibrium to SO2. Structure thought ot be (CO)4Fe-CO2H; B |
ΔrH° | 56.7 ± 4.0 | kcal/mol | IMRB | Lane, Sallans, et al., 1985 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 46.8 ± 4.0 | kcal/mol | IMRB | Lane, Sallans, et al., 1985 | gas phase; B |
C9FeNiO9 (g) = (g) + (g)
By formula: C9FeNiO9 (g) = C4NiO4 (g) + C5FeO5 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 9.01 | kcal/mol | EqG | Baev and Fedulova, 1983 | Temperature range: 293-313 K; MS |
By formula: F- + C5FeO5 = (F- • C5FeO5)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 40.9 ± 2.0 | kcal/mol | IMRE | Lane, Sallans, et al., 1985 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 34.4 ± 2.0 | kcal/mol | IMRE | Lane, Sallans, et al., 1985 | gas phase; B |
By formula: Cl- + C5FeO5 = (Cl- • C5FeO5)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 13.9 ± 3.0 | kcal/mol | IMRB | Lane, Sallans, et al., 1985 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 7.9 ± 3.0 | kcal/mol | IMRB | Lane, Sallans, et al., 1985 | gas phase; B |
By formula: C8H7O2- + C5FeO5 = (C8H7O2- • C5FeO5)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 45.0 ± 6.0 | kcal/mol | IMRB | Lane, Sallans, et al., 1985 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 35.5 ± 6.0 | kcal/mol | IMRB | Lane, Sallans, et al., 1985 | gas phase; B |
By formula: H- + C5FeO5 = (H- • C5FeO5)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 56.2 ± 3.0 | kcal/mol | IMRB | Lane, Sallans, et al., 1985 | gas phase; B |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 199.1 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 190.8 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
7.897 ± 0.025 | PIPECO | Norwood, Ali, et al., 1990 | LL |
8.4 ± 0.2 | EI | Clements and Sale, 1976 | LLK |
7.98 ± 0.01 | PI | Distefano, 1970 | RDSH |
8.00 ± 0.08 | PE | Lloyd and Schlag, 1969 | RDSH |
7.96 ± 0.02 | PI | Lloyd and Schlag, 1969 | RDSH |
7.95 ± 0.03 | PI | Vilesov and Kurbatov, 1961 | RDSH |
8.6 | PE | Harada, Ohno, et al., 1983 | Vertical value; LBLHLM |
8.60 | PE | Head, Nixon, et al., 1975 | Vertical value; LLK |
8.6 | PE | Baerends, Oudshoorn, et al., 1975 | Vertical value; LLK |
Appearance energy determinations
References
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Lewis, Golden, et al., 1984
Lewis, K.E.; Golden, D.M.; Smith, G.P.,
Organometallic bond dissociation energies: Laser pyrolysis of Fe(CO)5, Cr(CO)6, Mo(CO)6, and W(CO)6,
J. Am. Chem. Soc., 1984, 106, 3905. [all data]
Smith and Laine, 1981
Smith, G.P.; Laine, R.M.,
Organometallic bond dissociation energies. Laser pyrolysis of Fe(CO)5,
J. Phys. Chem., 1981, 85, 1620. [all data]
Miller and Grant, 1985
Miller, M.E.; Grant, E.R.,
J. Am. Chem. Soc., 1985, 107, 3386. [all data]
Walsh, 1986
Walsh, R.,
NATO Advanced Workshop on the Design, Activation and Transformation of Organometallics into Common and Exotic Materials, Montpellier, France, 1986. [all data]
Ray, Brandow, et al., 1988
Ray, U.; Brandow, S.L.; Bandukwalla, G.; Venkataraman, B.K.; Zhang, Z.; Vernon, M.,
J. Chem. Phys., 1988, 89, 4092. [all data]
Sunderlin, Wang, et al., 1992
Sunderlin, L.S.; Wang, D.; Squires, R.R.,
Metal Carbonyl Bond Strengths in Fe(CO)n- and Ni(CO)n-,
J. Am. Chem. Soc., 1992, 114, 8, 2788, https://doi.org/10.1021/ja00034a004
. [all data]
Engelking and Lineberger, 1979
Engelking, P.C.; Lineberger, W.C.,
Laser photoelectron spectrometry of the negative ions of iron and iron carbonyls. Electron affinity determination for the series Fe(CO)n,n=0,1,2,3,4,
J. Am. Chem. Soc., 1979, 101, 5569. [all data]
Compton and Stockdale, 1976
Compton, R.N.; Stockdale, J.A.D.,
Formation of gas phase negative ions in Fe(CO)5 and Ni(CO)4,
Int. J. Mass Spectrom. Ion Phys., 1976, 22, 47. [all data]
Sunderlin and Squires, 1993
Sunderlin, L.S.; Squires, R.R.,
Energetics and Mechanism of the Thermal Decarboxylation of (CO)4FeCOOH- in the Gas Phase,
J. Am. Chem. Soc., 1993, 115, 1, 337, https://doi.org/10.1021/ja00054a048
. [all data]
Lane, Sallans, et al., 1985
Lane, K.R.; Sallans, L.; Squires, R.R.,
Anion affinities of transition metal carbonyls. A thermochemical correlation for iron tetracarbonyl acyl negative ions,
J. Am. Chem. Soc., 1985, 107, 5369. [all data]
Baev and Fedulova, 1983
Baev, A.K.; Fedulova, L.G.,
Russ. J. Phys. Chem., 1983, 57, 1159. [all data]
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Norwood, Ali, et al., 1990
Norwood, K.; Ali, A.; Flesch, G.D.; Ng, C.Y.,
A photoelectron-photoion coincidence study of Fe(CO)5,
J. Am. Chem. Soc., 1990, 112, 7502. [all data]
Clements and Sale, 1976
Clements, P.J.; Sale, F.R.,
A mass spectrometric study of nickel tetracarbonyl, iron pentacarbonyl and binary mixtures of these compounds,
Metall. Trans. B:, 1976, 7, 171. [all data]
Distefano, 1970
Distefano, G.,
Photoionization study of Fe(CO)5 and Ni(CO)4,
J. Res. NBS, 1970, 74A, 233. [all data]
Lloyd and Schlag, 1969
Lloyd, D.R.; Schlag, E.W.,
Photoionization studies of metal carbonyls. I. Ionization potentials and the bonding in group VI metal hexacarbonyls and in mononuclear carbonyls and nitrosyl carbonyls of iron, cobalt, and nickel,
Inorg. Chem., 1969, 8, 2544. [all data]
Vilesov and Kurbatov, 1961
Vilesov, F.I.; Kurbatov, B.L.,
Photoionization of esters and metal carbonyis in the gaseous phase,
Dokl. Akad. Nauk SSSR, 1961, 140, 1364, In original 792. [all data]
Harada, Ohno, et al., 1983
Harada, Y.; Ohno, K.; Mutoh, H.,
Penning ionization electron spectroscopy of CO and Fe(CO)5. Study of electronic structure of Fe(CO)5 from electron distribution of individual molecular orbitals,
J. Chem. Phys., 1983, 79, 3251. [all data]
Head, Nixon, et al., 1975
Head, R.A.; Nixon, J.F.; Sharp, G.J.; Clark, R.J.,
Photoelectron spectroscopic study of metal trifluorophosphine and hydridotrifluorophosphine complexes,
J. Chem. Soc. Dalton Trans., 1975, 2054. [all data]
Baerends, Oudshoorn, et al., 1975
Baerends, E.J.; Oudshoorn, Ch.; Oskam, A.,
Photoelectron spectra and Xα calculations of iron pentacarbonyl and ethyleneiron tetracarbonyl,
J. Electron Spectrosc. Relat. Phenom., 1975, 6, 259. [all data]
Bidinosti and McIntyre, 1967
Bidinosti, D.R.; McIntyre, N.S.,
Electron-impact study of some binary metal carbonyls,
Can. J. Chem., 1967, 45, 641. [all data]
Fieber-Erdmann, Holub-Krappe, et al., 1995
Fieber-Erdmann, M.; Holub-Krappe, E.; Broker, G.; Dujardin, G.; Ding, A.,
Fragmentation psectroscopy of photoionized Fe(CO)5: a molecular model for a heterogeneous cluster,
Int. J. Mass Spectrom. Ion Processes, 1995, 149/150, 513. [all data]
Junk and Svec, 1968
Junk, G.A.; Svec, H.J.,
Energetics of the ionization and dissociation of Ni(CO)4, Fe(CO)5, Cr(CO)6, Mo(CO)6 and W(CO)6,
Z. Naturforsch., 1968, 23b, 1. [all data]
Foffani, Pignataro, et al., 1965
Foffani, A.; Pignataro, S.; Cantone, B.; Grasso, F.,
Mass spectra of metal hexacarbonyls,
Z. Physik. Chem. (Frankfurt), 1965, 45, 79. [all data]
Winters and Kiser, 1964
Winters, R.E.; Kiser, R.W.,
A mass spectrometric investigation of nickel tetracarbonyl and iron pentacarbonyl,
Inorg. Chem., 1964, 3, 699. [all data]
Conard and Sridhar, 1978
Conard, B.R.; Sridhar, R.,
Appearance potentials of ion fragments of iron pentacarbonyl,
Can. J. Chem., 1978, 56, 2607. [all data]
Pignataro and Lossing, 1968
Pignataro, S.; Lossing, F.P.,
Thermal decomposition of organometallic compounds in the ion source of a mass spectrometer,
J. Organometal. Chem., 1968, 11, 571. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.