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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Reaction thermochemistry data
Go To: Top, 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) = 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, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
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]
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]
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, Reaction thermochemistry data, References
- Symbols used in this document:
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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