Cobalt, tetracarbonyl
- Formula: C4CoO4
- Molecular weight: 170.9736
- IUPAC Standard InChI: InChI=1S/4CH2O.Co/c4*1-2;/h4*1H2;
- IUPAC Standard InChIKey: QXPUSHXZNFSNGM-UHFFFAOYSA-N
- CAS Registry Number: 58207-38-8
- Chemical structure:
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Gas phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: José A. Martinho Simões
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -562.1 ± 7.4 | kJ/mol | Review | Martinho Simões | The enthalpy of formation relies on -1184.1 ± 6.9 kJ/mol for the enthalpy of formation of Co2(CO)8(g). |
| ΔfH°gas | -560.1 | kJ/mol | Review | Martinho Simões |
Reaction thermochemistry data
Go To: Top, Gas phase 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 compiled by: José A. Martinho Simões
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
(solution) =
(solution) +
(solution)
By formula: C4HCoO4 (solution) = H (solution) + C4CoO4 (solution)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 277.8 ± 4.2 | kJ/mol | EChem | Parker, Handoo, et al., 1991 | solvent: Acetonitrile; Please also see Tilset and Parker, 1989. The reaction enthalpy was obtained from the pKa of the hydride complex (MH), 8.3, and from the oxidation potential of the anion (M-), Co(CO)4(-), by using the equation: ΔHrxn [kJ/mol] = 5.71pKa(MH) + 96.485(Eo)ox(M-) + C. C is a constant that was calculated as 248.9 kJ/mol Parker, Handoo, et al., 1991, by adjusting the previous equation to the calorimetrically derived values for the reactions Cr(Cp)(CO)3(H)(solution) = Cr(Cp)(CO)3(solution) + H(solution), 257.3 ± 4.2 kJ/mol, and Cr(Cp)(CO)2(PPh3)(H)(solution) = Cr(Cp)(CO)2(PPh3)(solution) + H(solution), 250.2 ± 4.2 kJ/mol Kiss, Zhang, et al., 1990. C depends on the solvent and on the reference electrode. The value given implies that the electrode potentials are referenced to ferrocene/ferricinium electrode |
(g) = 2
(g)
By formula: C8Co2O8 (g) = 2C4CoO4 (g)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 64. | kJ/mol | EST | Connor, 1977 | Please also see Pilcher and Skinner, 1982 and Martinho Simões and Beauchamp, 1990. The enthalpy of formation relies on -1184.1 ± 6.9 kJ/mol for the enthalpy of formation of Co2(CO)8(g). |
| ΔrH° | 60. ± 13. | kJ/mol | EG/EIMS | Bidinosti and McIntyre, 1970 | The reaction enthalpy includes an estimated correction to 298 K. A value of 60.7 ± 8.4 kJ/mol was reported at an average temperature of 330 K Bidinosti and McIntyre, 1970. |
References
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Martinho Simões
Martinho Simões, J.A.,
Private communication (see http://webbook.nist.gov/chemistry/om/). [all data]
Parker, Handoo, et al., 1991
Parker, V.D.; Handoo, K.L.; Roness, F.; Tilset, M.,
J. Am. Chem. Soc., 1991, 113, 7493. [all data]
Tilset and Parker, 1989
Tilset, M.; Parker, V.D.,
J. Am. Chem. Soc., 1989, 111, 6711; ibid. 1990. [all data]
Kiss, Zhang, et al., 1990
Kiss, G.; Zhang, K.; Mukerjee, S.L.; Hoff, C.; Roper, G.C.,
J. Am. Chem. Soc., 1990, 112, 5657. [all data]
Connor, 1977
Connor, J.A.,
Top. Curr. Chem., 1977, 71, 71. [all data]
Pilcher and Skinner, 1982
Pilcher, G.; Skinner, H.A.,
In The Chemistry of the Metal-Carbon Bond Wiley: New York, Hartley, F. R.; Patai, S., ed(s)., 1982. [all data]
Martinho Simões and Beauchamp, 1990
Martinho Simões, J.A.; Beauchamp, J.L.,
Chem. Rev., 1990, 90, 629. [all data]
Bidinosti and McIntyre, 1970
Bidinosti, D.R.; McIntyre, N.S.,
Mass spectrometric study of the thermal decomposition of dimanganese decacarbonyl and dicobalt octacarbonyl,
Can. J. Chem., 1970, 48, 593. [all data]
Notes
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- Symbols used in this document:
ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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