9H-Purine
- Formula: C5H4N4
- Molecular weight: 120.1121
- IUPAC Standard InChI: InChI=1S/C5H4N4/c1-4-5(8-2-6-1)9-3-7-4/h1-3H,(H,6,7,8,9)
- IUPAC Standard InChIKey: KDCGOANMDULRCW-UHFFFAOYSA-N
- CAS Registry Number: 120-73-0
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: 7H-Purine; 1H-Purine; Purine; β-Purine; Isopurine; 3,5,7-Triazaindole; 6H-Imidazo[4,5-d]pyrimidine; Imidazo(4,5-d)pyrimidine; NSC 753; X 128; 7H-Imidazo(4,5-d)pyrimidine
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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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | Ccb | Zaheeruddin and Lodhi, 1991 | uncertain value: 2238.05 kJ/mol; ALS | ||
| ΔfH°solid | 169.4 ± 2.7 | kJ/mol | Ccr | Kirklin and Domalski, 1984 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | Ccb | Zaheeruddin and Lodhi, 1991 | uncertain value: -4777.28 kJ/mol; ALS | ||
| ΔcH°solid | -2708.6 ± 2.3 | kJ/mol | Ccr | Kirklin and Domalski, 1984 | ALS |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 106.9 | 298.15 | Kirklin and Domalski, 1984 | DH |
References
Go To: Top, Condensed phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Zaheeruddin and Lodhi, 1991
Zaheeruddin, M.; Lodhi, Z.H.,
Enthalpies of formation of some cyclic compounds,
Phys. Chem. (Peshawar Pak.), 1991, 10, 111-118. [all data]
Kirklin and Domalski, 1984
Kirklin, D.R.; Domalski, E.S.,
Enthalpy of combustion of purine,
J. Chem. Thermodyn., 1984, 16, 633-641. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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