2,8,12,18-Tetraethyl-3,7,13,18-tetramethyl-21H,23H-porphin
- Formula: C32H38N4
- Molecular weight: 478.6709
- CAS Registry Number: 448-70-4
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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 |
|---|---|---|---|---|---|
| ΔcH°solid | -18025. ± 18. | kJ/mol | Ccb | Stern and Klebs, 1933 | Reanalyzed by Cox and Pilcher, 1970, Original value = -18034. kJ/mol; Heat of combustion at 288 K |
Gas phase ion energetics data
Go To: Top, Condensed phase thermochemistry data, 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: Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 6.2 | PE | Dupuis, Roberge, et al., 1980 | |
| 6.3 | PE | Dupuis, Roberge, et al., 1980 | Vertical value |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Stern and Klebs, 1933
Stern, A.; Klebs, G.,
Calorimetrische bestimmungen bei mehrkernigen pyrrolderivaten. IV. 1. Experimentelle daten fur einige porphyrine, chlorine, phaophorbide and purpurine,
Ann. Chim., 1933, 505, 295-306. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [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 - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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