21H,23H-porphine
- Formula: C20H14N4
- Molecular weight: 310.3520
- CAS Registry Number: 101-60-0
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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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | -264.56 ± 0.87 | kcal/mol | Ccb | Longo, Finarelli, et al., 1970 | |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -2094.68 ± 0.43 | kcal/mol | Ccb | Longo, Finarelli, et al., 1970 |
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: William E. Acree, Jr., James S. Chickos
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Method | Reference |
|---|---|---|---|
| 21. ± 0.7 | 424. - 507. | Fluoresc | Stefanov, Stibor, et al., 2004 |
Gas phase ion energetics 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: Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 6.6 | PE | Dupuis, Roberge, et al., 1980 | |
| 6.9 | PE | Dupuis, Roberge, et al., 1980 | Vertical value |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Longo, Finarelli, et al., 1970
Longo, F.R.; Finarelli, J.D.; Schmalzbach, E.; Alder, A.D.,
The enthalpy of formation of porphin,
J. Phys. Chem., 1970, 74, 3296-3297. [all data]
Stefanov, Stibor, et al., 2004
Stefanov, Andre; Stibor, Alexander; Dominguez-Clarimon, Alex; Arndt, Markus,
Sublimation enthalpy of dye molecules measured using fluorescence,
J. Chem. Phys., 2004, 121, 14, 6935, https://doi.org/10.1063/1.1792551
. [all data]
Dupuis, Roberge, et al., 1980
Dupuis, P.; Roberge, R.; Sandorfy, C.,
The very low ionization potentials of porphyrins and the possible role of rydberg states in photosynthesis,
Chem. Phys. Lett., 1980, 75, 434. [all data]
Notes
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- Symbols used in this document:
ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔsubH Enthalpy of sublimation - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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