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
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Options:
Condensed phase thermochemistry data
Go To: Top, References, Notes
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: 534.907 kcal/mol; ALS | ||
| ΔfH°solid | 40.49 ± 0.63 | kcal/mol | Ccr | Kirklin and Domalski, 1984 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | Ccb | Zaheeruddin and Lodhi, 1991 | uncertain value: -1141.80 kcal/mol; ALS | ||
| ΔcH°solid | -647.38 ± 0.55 | kcal/mol | Ccr | Kirklin and Domalski, 1984 | ALS |
Constant pressure heat capacity of solid
| Cp,solid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 25.55 | 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
- 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.