Co4(CO)12

• Formula: C₁₂Co₄O₁₂
• Molecular weight: 571.8540
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • References
  • Notes
• Options:
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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
fH°gas	-417.8 ± 3.5	kcal/mol	Review	Martinho Simões
fH°gas	-417.4 ± 3.4	kcal/mol	Review	Martinho Simões
fH°gas	-417.6 ± 2.6	kcal/mol	Review	Martinho Simões	Selected data. Average of the values from Connor, Skinner, et al., 1973

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
fH°solid	-440.8 ± 3.3	kcal/mol	Review	Martinho Simões
fH°solid	-440.4 ± 3.3	kcal/mol	Review	Martinho Simões
fH°solid	-440.6 ± 2.3	kcal/mol	Review	Martinho Simões	Selected data. Average of the values from Connor, Skinner, et al., 1973

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 by: José A. Martinho Simões

Quantity	Value	Units	Method	Reference	Comment
subH°	23.0 ± 1.0	kcal/mol	TD-HFC	Pilcher and Skinner, 1982	Please also see Connor, Skinner, et al., 1973.

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

2 (solution) = C₁₂Co₄O₁₂ (solution) + 4 (solution)

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

Quantity	Value	Units	Method	Reference	Comment
rH°	29.49 ± 0.50	kcal/mol	EqS	Bor and Dietler, 1980	solvent: Hexane; Temperature range: 378-418 K

C₁₂Co₄O₁₂ (cr) = 12 (g) + 4 (cr)

By formula: C₁₂Co₄O₁₂ (cr) = 12CO (g) + 4Co (cr)

Quantity	Value	Units	Method	Reference	Comment
rH°	123.8 ± 3.3	kcal/mol	TD-HFC	Connor, Skinner, et al., 1973
rH°	123.4 ± 3.3	kcal/mol	HAL-HFC	Connor, Skinner, et al., 1973

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change 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]

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]

Bor and Dietler, 1980
Bor, G.; Dietler, U.K., J. Organometal. Chem., 1980, 191, 295. [all data]

Notes

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• Symbols used in this document:
  

  fH°gas	Enthalpy of formation of gas at standard conditions
  fH°solid	Enthalpy of formation of solid at standard conditions
  rH°	Enthalpy of reaction at standard conditions
  rS°	Entropy of reaction at standard conditions
  subH°	Enthalpy of sublimation 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.
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