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Dicobalt octacarbonyl


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
Deltafgas-1183.0 ± 9.1kJ/molReviewMartinho Simões 
Deltafgas-1185.2 ± 9.4kJ/molReviewMartinho Simões 
Deltafgas-1184.1 ± 6.9kJ/molReviewMartinho SimõesSelected 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
Deltafsolid-1248.2 ± 8.5kJ/molReviewMartinho Simões 
Deltafsolid-1250.4 ± 8.8kJ/molReviewMartinho Simões 
Deltafsolid-1249.3 ± 6.1kJ/molReviewMartinho SimõesSelected data. Average of the values from Connor, Skinner, et al., 1973 and Gardner, Cartner, et al., 1975.

Phase change 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 as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos
MS - José A. Martinho Simões

Quantity Value Units Method Reference Comment
Deltasub65.2 ± 3.3kJ/molN/APilcher and Skinner, 1983See also Cardner, Gartner, et al., 1975.; AC
Deltasub65.2 ± 3.3kJ/molTD-HFCGardner, Cartner, et al., 1975Another value for the enthalpy of sublimation has been reported: 75.3±6.3 Cartner, Robinson, et al., 1973.; MS

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Method Reference Comment
84.3 ± 0.5271.TEGarner, Chandra, et al., 1995Based on data from 264. - 278. K.; AC
103.8301.5AStephenson and Malanowski, 1987Based on data from 288. - 315. K. See also Baev, 1968.; AC
75.3 ± 6.3207. - 287.EMCartner, Robinson, et al., 1973, 2AC

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

Dicobalt octacarbonyl (solution) + Hydrogen (solution) = 2Cobalt, tetracarbonylhydro- (solution)

By formula: C8Co2O8 (solution) + H2 (solution) = 2C4HCoO4 (solution)

Quantity Value Units Method Reference Comment
Deltar19.7 ± 0.8kJ/molEqSRathke, Klingler, et al., 1992solvent: 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
Deltar13.0 ± 0.9kJ/molEqSBor, 1986solvent: n-Hexane; Temperature range: ca. 300-420 K
Deltar26.4kJ/molKinSAlemdaroglu, Penninger, et al., 1976solvent: 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
Deltar27.6kJ/molEqSAlemdaroglu, Penninger, et al., 1976solvent: n-Heptane; Temperature range: 353-428 K
Deltar13.4kJ/molEqSUngváry, 1972solvent: 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

Dicobalt octacarbonyl (g) = 2Cobalt, tetracarbonyl (g)

By formula: C8Co2O8 (g) = 2C4CoO4 (g)

Quantity Value Units Method Reference Comment
Deltar64.kJ/molESTConnor, 1977Please 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).
Deltar60. ± 13.kJ/molEG/EIMSBidinosti and McIntyre, 1970The 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.

Dicobalt octacarbonyl (solution) = C7Co2O7 (solution) + Carbon monoxide (solution)

By formula: C8Co2O8 (solution) = C7Co2O7 (solution) + CO (solution)

Quantity Value Units Method Reference Comment
Deltar92.7kJ/molKinSUngváry and Markó, 1974solvent: Heptane; Temperature range: 298-328 K
Deltar87.9kJ/molKinSUngváry, 1972solvent: Heptane; Temperature range: 307-337 K

0.5Dicobalt octacarbonyl (solution) + sodium (cr) = C4CoNaO4 (solution)

By formula: 0.5C8Co2O8 (solution) + Na (cr) = C4CoNaO4 (solution)

Quantity Value Units Method Reference Comment
Deltar-318. ± 11.kJ/molRSCKiss, Nolan, et al., 1994solvent: 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.

Dimanganese decacarbonyl (solution) + Dicobalt octacarbonyl (solution) = 2C9CoMnO9 (solution)

By formula: C10Mn2O10 (solution) + C8Co2O8 (solution) = 2C9CoMnO9 (solution)

Quantity Value Units Method Reference Comment
Deltar3.3 ± 1.3kJ/molEqSKlingler R.J. and Rathke, 1992solvent: Supercritical carbon dioxide; Temperature range: 353-453 K

2Dicobalt octacarbonyl (solution) = C12Co4O12 (solution) + 4Carbon monoxide (solution)

By formula: 2C8Co2O8 (solution) = C12Co4O12 (solution) + 4CO (solution)

Quantity Value Units Method Reference Comment
Deltar123.4 ± 2.1kJ/molEqSBor and Dietler, 1980solvent: Hexane; Temperature range: 378-418 K

C13H10NaO (solution) + 0.5Dicobalt octacarbonyl (solution) = C4CoNaO4 (solution) + Benzophenone (solution)

By formula: C13H10NaO (solution) + 0.5C8Co2O8 (solution) = C4CoNaO4 (solution) + C13H10O (solution)

Quantity Value Units Method Reference Comment
Deltar-157. ± 11.kJ/molRSCKiss, Nolan, et al., 1994solvent: Tetrahydrofuran

Dicobalt octacarbonyl (cr) = 8Carbon monoxide (g) + 2cobalt (cr)

By formula: C8Co2O8 (cr) = 8CO (g) + 2Co (cr)

Quantity Value Units Method Reference Comment
Deltar364.0 ± 8.4kJ/molTD-HFCConnor, Skinner, et al., 1973Please also see Pedley and Rylance, 1977.

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Chemical Concepts
NIST MS number 154491

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References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), 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]

Pilcher and Skinner, 1983
Pilcher, G.; Skinner, H.A., Thermochemistry of organometallic compounds, 1983, 43-90, https://doi.org/10.1002/9780470771686.ch2 . [all data]

Cardner, Gartner, et al., 1975
Cardner, Peter J.; Gartner, Anthony; Cunninghame, Robert G.; Robinson, Brian H., Bond energies in dicobalt octacarbonyl and bromo- and chloro-methylidynetricobalt enneacarbonyls, J. Chem. Soc., Dalton Trans., 1975, 23, 2582, https://doi.org/10.1039/dt9750002582 . [all data]

Cartner, Robinson, et al., 1973
Cartner, A.; Robinson, B.; Gardner, P.J., J. Chem. Soc., Chem. Commun., 1973, 317.. [all data]

Garner, Chandra, et al., 1995
Garner, M.L.; Chandra, D.; Lau, K.H., Low-temperature vapor pressures of W-, Cr-, and Co-carbonyls, JPE, 1995, 16, 1, 24-29, https://doi.org/10.1007/BF02646245 . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Baev, 1968
Baev, A.K., Vestsi Akad. Navak BSSR, Ser. Khim. Navuk, 1968, 4, 76. [all data]

Cartner, Robinson, et al., 1973, 2
Cartner, Anthony; Robinson, Brian; Gardner, Peter J., Heat of formation of dicobalt octacarbonyl and the metal?carbon monoxide bond strength in carbonyls, J. Chem. Soc., Chem. Commun., 1973, 9, 317b, https://doi.org/10.1039/c3973000317b . [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, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), References