Pentane, 2,2,4,4-tetramethyl-
- Formula: C9H20
- Molecular weight: 128.2551
- IUPAC Standard InChI: InChI=1S/C9H20/c1-8(2,3)7-9(4,5)6/h7H2,1-6H3
- IUPAC Standard InChIKey: GUMULFRCHLJNDY-UHFFFAOYSA-N
- CAS Registry Number: 1070-87-7
- 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: Di-tert-Butylmethane; 2,2,4,4-Tetramethylpentane
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Gas 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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -241.5 ± 1.5 | kJ/mol | Cm | Fuchs and Peacock, 1979 | ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas | 430.16 | J/mol*K | N/A | Finke H.L., 1976 | GT |
Constant pressure heat capacity of gas
| Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 153.72 | 200. | Scott D.W., 1974 | Recommended values were obtained from the consistent correlation scheme for alkanes [ Scott D.W., 1974, 2, Scott D.W., 1974]. This approach gives a good agreement with experimental data available for alkanes. However, large uncertainties could be expected at high temperatures.; GT |
| 198.95 | 273.15 | ||
| 214.6 ± 0.7 | 298.15 | ||
| 215.77 | 300. | ||
| 276.56 | 400. | ||
| 331.21 | 500. | ||
| 379.07 | 600. | ||
| 420.49 | 700. | ||
| 456.47 | 800. | ||
| 488.69 | 900. | ||
| 516.72 | 1000. | ||
| 541.41 | 1100. | ||
| 563.58 | 1200. | ||
| 581.58 | 1300. | ||
| 602.50 | 1400. | ||
| 619.23 | 1500. |
References
Go To: Top, Gas phase thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Fuchs and Peacock, 1979
Fuchs, R.; Peacock, L.A.,
Heats of vaporization and gaseous heats of formation of some five- and six-membered ring alkenes,
Can. J. Chem., 1979, 57, 2302-2304. [all data]
Finke H.L., 1976
Finke H.L.,
Low-temperature thermal quantities for five alkyl-substituted pentanes,
J. Chem. Thermodyn., 1976, 8, 965-983. [all data]
Scott D.W., 1974
Scott D.W.,
Chemical Thermodynamic Properties of Hydrocarbons and Related Substances. Properties of the Alkane Hydrocarbons, C1 through C10 in the Ideal Gas State from 0 to 1500 K. U.S. Bureau of Mines, Bulletin 666, 1974. [all data]
Scott D.W., 1974, 2
Scott D.W.,
Correlation of the chemical thermodynamic properties of alkane hydrocarbons,
J. Chem. Phys., 1974, 60, 3144-3165. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas S°gas Entropy of gas at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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