Dicobalt octacarbonyl
- Formula: C8Co2O8
- Molecular weight: 341.9472
- IUPAC Standard InChI: InChI=1S/8CO.2Co/c8*1-2;;
- IUPAC Standard InChIKey: NFWSABSVGZVHCA-UHFFFAOYSA-N
- CAS Registry Number: 10210-68-1
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Cobalt, di-μ-carbonylhexacarbonyldi-, (Co-Co); Cobalt carbonyl (Co2(CO)8); Cobalt tetracarbonyl dimer; Di-μ-carbonylhexacarbonyldicobalt; Dicobalt carbonyl (Co2(CO)8); Octacarbonyldicobalt; Co2(CO)8; Cobalt carbonyl; Cobalt, di-μ-carbonylhexacarbonyldi-; Cobalt octacarbonyl
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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 | -1183.0 ± 9.1 | kJ/mol | Review | Martinho Simões | |
| ΔfH°gas | -1185.2 ± 9.4 | kJ/mol | Review | Martinho Simões | |
| ΔfH°gas | -1184.1 ± 6.9 | kJ/mol | Review | Martinho Simões | Selected data. Average of the values from Connor, Skinner, et al., 1973 and Gardner, Cartner, et al., 1975. |
Condensed 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°solid | -1248.2 ± 8.5 | kJ/mol | Review | Martinho Simões | |
| ΔfH°solid | -1250.4 ± 8.8 | kJ/mol | Review | Martinho Simões | |
| ΔfH°solid | -1249.3 ± 6.1 | kJ/mol | Review | Martinho Simões | Selected data. Average of the values from Connor, Skinner, et al., 1973 and Gardner, Cartner, et al., 1975. |
Reaction 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
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) = 2
(solution)
By formula: C8Co2O8 (solution) + H2 (solution) = 2C4HCoO4 (solution)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 19.7 ± 0.8 | kJ/mol | EqS | Rathke, Klingler, et al., 1992 | solvent: Supercritical carbon dioxide; Temperature range: 333-453 K. The results corrected for 1 atm pressure of H2 are 16.7 kJ/mol and -17.6 J/(mol K) Rathke, Klingler, et al., 1992 |
| ΔrH° | 13.0 ± 0.9 | kJ/mol | EqS | Bor, 1986 | solvent: n-Hexane; Temperature range: ca. 300-420 K |
| ΔrH° | 26.4 | kJ/mol | KinS | Alemdaroglu, Penninger, et al., 1976 | solvent: n-Heptane; The reaction enthalpy relies on the experimental values for the forward and reverse activation enthalpies, 72.4 and 46.0 kJ/mol, respectively Alemdaroglu, Penninger, et al., 1976. A rather different value has, however, been reported for the activation enthalpy of the forward reaction, 104.6 kJ/mol Ungváry, 1972 |
| ΔrH° | 27.6 | kJ/mol | EqS | Alemdaroglu, Penninger, et al., 1976 | solvent: n-Heptane; Temperature range: 353-428 K |
| ΔrH° | 13.4 | kJ/mol | EqS | Ungváry, 1972 | solvent: n-Heptane; Temperature range: 307-428 K. The results corrected for 1 atm pressure of H2 are 18.0 kJ/mol and -10.9 J/(mol K) Rathke, Klingler, et al., 1992 |
(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. |
(solution) = C7Co2O7 (solution) +
(solution)
By formula: C8Co2O8 (solution) = C7Co2O7 (solution) + CO (solution)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 92.7 | kJ/mol | KinS | Ungváry and Markó, 1974 | solvent: Heptane; Temperature range: 298-328 K |
| ΔrH° | 87.9 | kJ/mol | KinS | Ungváry, 1972 | solvent: Heptane; Temperature range: 307-337 K |
0.5 (solution) +
(cr) = C4CoNaO4 (solution)
By formula: 0.5C8Co2O8 (solution) + Na (cr) = C4CoNaO4 (solution)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -318. ± 11. | kJ/mol | RSC | Kiss, Nolan, et al., 1994 | solvent: Tetrahydrofuran; The reaction enthalpy was calculated from the enthalpies of the following reactions: 0.5Co2(CO)8(solution) + (Na)(Ph2CO)(solution) = (Na)[Co(CO)4](solution) + Ph2CO(solution), -157. ± 11. kJ/mol, and Ph2CO(solution) + Na(cr) = (Na)(Ph2CO)(solution), -161.1 ± 2.5 kJ/mol Kiss, Nolan, et al., 1994. |
(solution) +
(solution) = 2C9CoMnO9 (solution)
By formula: C10Mn2O10 (solution) + C8Co2O8 (solution) = 2C9CoMnO9 (solution)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 3.3 ± 1.3 | kJ/mol | EqS | Klingler R.J. and Rathke, 1992 | solvent: Supercritical carbon dioxide; Temperature range: 353-453 K |
2 (solution) = C12Co4O12 (solution) + 4
(solution)
By formula: 2C8Co2O8 (solution) = C12Co4O12 (solution) + 4CO (solution)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 123.4 ± 2.1 | kJ/mol | EqS | Bor and Dietler, 1980 | solvent: Hexane; Temperature range: 378-418 K |
C13H10NaO (solution) + 0.5 (solution) = C4CoNaO4 (solution) +
(solution)
By formula: C13H10NaO (solution) + 0.5C8Co2O8 (solution) = C4CoNaO4 (solution) + C13H10O (solution)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -157. ± 11. | kJ/mol | RSC | Kiss, Nolan, et al., 1994 | solvent: Tetrahydrofuran |
(cr) = 8
(g) + 2
(cr)
By formula: C8Co2O8 (cr) = 8CO (g) + 2Co (cr)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 364.0 ± 8.4 | kJ/mol | TD-HFC | Connor, Skinner, et al., 1973 | Please also see Pedley and Rylance, 1977. |
References
Go To: Top, Gas phase thermochemistry data, Condensed 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]
Connor, Skinner, et al., 1973
Connor, J.A.; Skinner, H.A.; Virmani, Y.,
High temperature microcalorimetric studies of the thermal decomposition and iodination of polynuclear carbonyls of Fe, Co, Ru, Rh, Re, Os and Ir,
Faraday Symp. Chem. Soc., 1973, 8, 18, https://doi.org/10.1039/fs9730800018
. [all data]
Gardner, Cartner, et al., 1975
Gardner, P.J.; Cartner, A.; Cunninghame, R.G.; Robinson, B.H.,
J. Chem. Soc., Dalton Trans., 1975, 2582.. [all data]
Rathke, Klingler, et al., 1992
Rathke, J.W.; Klingler, R.J.; Krause, T.R.,
Organometallics, 1992, 11, 585. [all data]
Bor, 1986
Bor, G.,
Pure & Appl. Chem., 1986, 58, 543. [all data]
Alemdaroglu, Penninger, et al., 1976
Alemdaroglu, N.H.; Penninger, J.M.L.; Oltay, E.,
Monatsh. Chem., 1976, 107, 1043. [all data]
Ungváry, 1972
Ungváry, F.,
J. Organometal. Chem., 1972, 36, 363. [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]
Ungváry and Markó, 1974
Ungváry, F.; Markó, L.,
J. Organometal. Chem., 1974, 71, 283. [all data]
Kiss, Nolan, et al., 1994
Kiss, G.; Nolan, S.P.; Hoff, C.D.,
Inorg. Chim. Acta, 1994, 227, 285. [all data]
Klingler R.J. and Rathke, 1992
Klingler R.J.; Rathke, J.W.,
Inorg. Chem., 1992, 31, 804. [all data]
Bor and Dietler, 1980
Bor, G.; Dietler, U.K.,
J. Organometal. Chem., 1980, 191, 295. [all data]
Pedley and Rylance, 1977
Pedley, J.B.; Rylance, J.,
Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References
- Symbols used in this document:
ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid 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
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