Naphthalene, 2,3-dimethyl-
- Formula: C12H12
- Molecular weight: 156.2237
- IUPAC Standard InChI: InChI=1S/C12H12/c1-9-7-11-5-3-4-6-12(11)8-10(9)2/h3-8H,1-2H3
- IUPAC Standard InChIKey: WWGUMAYGTYQSGA-UHFFFAOYSA-N
- CAS Registry Number: 581-40-8
- 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: Guajen; 2,3-Dimethylnaphthalene
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Data at NIST subscription sites:
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.
Gas phase thermochemistry 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 76.1 ± 2.0 | kJ/mol | Ccb | Colomina, Jimenez, et al., 1979 | ALS |
| ΔfH°gas | 79.9 | kJ/mol | N/A | Good, 1973 | Value computed using ΔfHsolid° value of -2.3±1.1 kj/mol from Good, 1973 and ΔsubH° value of 82.2 kj/mol from Colomina, Jimenez, et al., 1979.; DRB |
Constant pressure heat capacity of gas
| Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 42.2 | 50. | Thermodynamics Research Center, 1997 | p=1 bar. Among all statistically calculated values of S(T) for methyl- and dimethylnaphthalenes [ Thermodynamics Research Center, 1997], only for 2,3-dimethylnaphthalene calculated values are substantially different from experimental ones.; GT |
| 72.7 | 100. | ||
| 101.7 | 150. | ||
| 130.4 | 200. | ||
| 173.3 | 273.15 | ||
| 188.0 | 298.15 | ||
| 189.1 | 300. | ||
| 244.9 | 400. | ||
| 292.8 | 500. | ||
| 332.2 | 600. | ||
| 364.6 | 700. | ||
| 391.4 | 800. | ||
| 414.0 | 900. | ||
| 433.0 | 1000. | ||
| 449. | 1100. | ||
| 463. | 1200. | ||
| 475. | 1300. | ||
| 485. | 1400. | ||
| 494. | 1500. |
Condensed phase thermochemistry data
Go To: Top, Gas 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 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 | -6.1 ± 1.9 | kJ/mol | Ccb | Colomina, Jimenez, et al., 1979 | ALS |
| ΔfH°solid | -2.3 ± 1.1 | kJ/mol | Ccb | Good, 1973 | crystal phase; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°solid | -6431.0 ± 1.1 | kJ/mol | Ccb | Colomina, Jimenez, et al., 1979 | Corresponding ΔfHºsolid = -6.09 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°solid | -6434.78 ± 0.88 | kJ/mol | Ccb | Good, 1973 | crystal phase; Corresponding ΔfHºsolid = -2.3 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 225.853 | J/mol*K | N/A | Messerly, Finke, et al., 1988 | crystaline, I phase; DH |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 215. | 298. | Sciesinski, Godlewska, et al., 1989 | T = 100 to 350 K. Cp value estimated from graph.; DH |
| 216.466 | 298.15 | Messerly, Finke, et al., 1988 | crystaline, I phase; T = 10 to 400 K.; DH |
References
Go To: Top, Gas phase thermochemistry data, 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.
Colomina, Jimenez, et al., 1979
Colomina, M.; Jimenez, P.; Roux, M.V.; Turrion, C.,
Thermochemical properties of naphthalene derivatives. V. Formation enthalpies of 2,3-dimethylnaphthalene and 2,3-dihydroxynaphthalene,
An. Quim., 1979, 75, 620-624. [all data]
Good, 1973
Good, W.D.,
The enthalpies of combustion and formation of 1,8-dimethylnaphthalene, 2,3-dimethylnaphthalene, 2,6-dimethylnaphthalene, and 2,7-dimethylnaphthalene,
J. Chem. Thermodyn., 1973, 5, 715-720. [all data]
Thermodynamics Research Center, 1997
Thermodynamics Research Center,
Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]
Messerly, Finke, et al., 1988
Messerly, J.F.; Finke, H.L.; Good, W.D.; Gammon, B.E.,
Condensed-phase heat capacities and derived thermodynamic properties for 1,4-dimethylbenzene, 1,2-diphenylethane, and 2,3-dimethylnaphthalene,
J. Chem. Thermodynam., 1988, 20, 485-501. [all data]
Sciesinski, Godlewska, et al., 1989
Sciesinski, J.; Godlewska, M.; Witko, W.,
An adiabatic calrimetry study of the polymorphism of 2,3-dimethylnaphthalene,
J. Phys.: Condens. Matter, 1989, 1(22), 3545-3550. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°gas Enthalpy of formation of gas 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.