Chromium,pentacarbonyl(pyridine)-

Formula: C₁₀H₅CrNO₅
Molecular weight: 271.1465
CAS Registry Number: 14740-77-3
Information on this page:
Other data available:
Options:
- Switch to SI units

Reaction thermochemistry data

Go To: Top, Gas phase ion energetics data, References, Notes

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

C₁₀H₅CrNO₅ (solution) + (solution) = (solution) + (solution)

By formula: C₁₀H₅CrNO₅ (solution) + CO (solution) = C₆CrO₆ (solution) + C₄H₄N₂ (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-14.8	kcal/mol	KinS	Wovkulich and Atwood, 1980	solvent: Hexane; The data rely on the enthalpy and entropy of activation for the forward reaction, 25.4 ± 1.1 kcal/mol and 13.0±14.6 J/(mol K) Dennenberg and Darensbourg, 1972, and also on the enthalpy and entropy of activation for the Cr-CO dissociation in Cr(CO)6, 40.20 ± 0.60 kcal/mol and 94.6±6.3 J/(mol K) Graham and Angelici, 1967. The latter data were obtained in decalin

C₁₂H₁₆CrO₅ (solution) + (solution) = (solution) + C₁₀H₅CrNO₅ (solution)

By formula: C₁₂H₁₆CrO₅ (solution) + C₄H₄N₂ (solution) = C₇H₁₆ (solution) + C₁₀H₅CrNO₅ (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-20.1 ± 0.41	kcal/mol	PAC	Yang, Vaida, et al., 1988	solvent: Heptane

C₁₀H₅CrNO₅ (cr) + (g) = (g) + (g)

By formula: C₁₀H₅CrNO₅ (cr) + CO (g) = C₆CrO₆ (g) + C₄H₄N₂ (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18. ± 1.	kcal/mol	DSC	Daamen, van der Poel, et al., 1979

Gas phase ion energetics data

Go To: Top, Reaction thermochemistry data, References, Notes

Data compiled by: Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

IE (eV)	Method	Reference	Comment
7.30	PE	Weiner, Gin, et al., 1977	Vertical value

References

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Notes

Wovkulich and Atwood, 1980
Wovkulich, M.J.; Atwood, J.D., J. Organometal. Chem., 1980, 184, 77. [all data]

Dennenberg and Darensbourg, 1972
Dennenberg, R.J.; Darensbourg, D.J., Inorg. Chem., 1972, 11, 72. [all data]

Graham and Angelici, 1967
Graham, J.R.; Angelici, R.J., Inorg. Chem., 1967, 6, 2082. [all data]

Yang, Vaida, et al., 1988
Yang, G.K.; Vaida, V.; Peters, K.S., Polyhedron, 1988, 7, 1619. [all data]

Daamen, van der Poel, et al., 1979
Daamen, H.; van der Poel, H.; Stufkens, D.J.; Oskam, A., Thermochim. Acta, 1979, 34, 69. [all data]

Weiner, Gin, et al., 1977
Weiner, M.A.; Gin, A.; Lattman, M., Ultraviolet photoelectron spectra of 4-substituted pyridine- pentacarbonylchromium complexes, Inorg. Chim. Acta, 1977, 24, 235. [all data]

Notes

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References

Symbols used in this document:

Δ_rH° Enthalpy of reaction at standard conditions

Δ_rS° Entropy of reaction 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.
Customer support for NIST Standard Reference Data products.

Δ_rH°	Enthalpy of reaction at standard conditions
Δ_rS°	Entropy of reaction at standard conditions