2(1H)-Quinoxalinone
- Formula: C8H6N2O
- Molecular weight: 146.1460
- IUPAC Standard InChI: InChI=1S/C8H6N2O/c11-8-5-9-6-3-1-2-4-7(6)10-8/h1-5H,(H,10,11)
- IUPAC Standard InChIKey: FFRYUAVNPBUEIC-UHFFFAOYSA-N
- CAS Registry Number: 1196-57-2
- 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: Quinoxalin-2-one; 2-Hydroxyquinoxaline; 2-Quinoxalinol; 2-Quinoxalinone; 3-Quinoxalinone; 1,2-Dihydroquinoxalin-2-one; 2-Quinoxalone; Quinoxalinone; quinoxalin-2(1H)-one
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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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 118.5 ± 3.1 | kJ/mol | ME | Monte and Hillesheim, 2000 | |
| ΔsubH° | 125.8 ± 4.0 | kJ/mol | C | Ribeiro da Silva, Matos, et al., 2000 |
Enthalpy of sublimation
| ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 116.1 ± 0.6 | 391. | ME | Monte and Hillesheim, 2000 | Based on data from 383. to 399. K. |
Enthalpy of fusion
| ΔfusH (kJ/mol) | Temperature (K) | Method | Reference |
|---|---|---|---|
| 32.5 | 542.5 | DSC | Monte and Hillesheim, 2000 |
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.
Monte and Hillesheim, 2000
Monte, Manuel J.S.; Hillesheim, Dorothea M.,
Thermodynamic Study on the Sublimation of Six Substituted Quinoxalines,
J. Chem. Eng. Data, 2000, 45, 6, 1088-1092, https://doi.org/10.1021/je0001577
. [all data]
Ribeiro da Silva, Matos, et al., 2000
Ribeiro da Silva, M.A.V.; Matos, M.A.R.; Rio, C.M.A.; Miranda, M.S.; Morais, V.M.F.,
Thermochemical and Theoretical Studies of 2-Hydroxyquinoxaline, 2,3-Dihydroxyquinoxaline, and 2-Hydroxy-3-methylquinoxaline,
J. Phys. Chem. A, 2000, 104, 28, 6644-6648, https://doi.org/10.1021/jp000694y
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
ΔfusH Enthalpy of fusion ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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