Quinoxaline, 2,3-dimethyl-
- Formula: C10H10N2
- Molecular weight: 158.1998
- IUPAC Standard InChI: InChI=1S/C10H10N2/c1-7-8(2)12-10-6-4-3-5-9(10)11-7/h3-6H,1-2H3
- IUPAC Standard InChIKey: FKHNZQFCDGOQGV-UHFFFAOYSA-N
- CAS Registry Number: 2379-55-7
- 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: 2,3-Dimethylquinoxaline
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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 as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 21.0 ± 0.1 | kcal/mol | ME | Monte and Hillesheim, 2000 | AC |
| ΔsubH° | 20.5 ± 0.43 | kcal/mol | C | Ribeiro da Silva, Morais, et al., 1996 | ALS |
| ΔsubH° | 20.5 | kcal/mol | N/A | Ribeiro da Silva, Morais, et al., 1996 | DRB |
| ΔsubH° | 20.5 ± 0.43 | kcal/mol | C | Ribeiro da Silva, Morais, et al., 1996 | AC |
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 21.0 ± 0.1 | 301. | ME | Monte and Hillesheim, 2000 | Based on data from 294. to 308. K.; AC |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 5.342 | 379.5 | DSC | Monte and Hillesheim, 2000 | AC |
References
Go To: Top, Phase change data, Notes
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, Morais, et al., 1996
Ribeiro da Silva, M.A.V.; Morais, V.M.F.; Matos, M.A.R.; Rio, C.M.A.; Piedade, G.M.G.S.,
Thermochemical and theoretical study of some methyldiazines,
Struct. Chem., 1996, 7, 329-336. [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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