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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Condensed phase thermochemistry 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:
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 |
|---|---|---|---|---|---|
| ΔcH°liquid | -1462.2 | kcal/mol | Ccb | Shtekher, Skuratov, et al., 1959 | Corresponding ΔfHºliquid = -67.4 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -1462.4 | kcal/mol | Ccb | Skuratov, Kozina, et al., 1958 | Corresponding ΔfHºliquid = -67.2 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| ΔcH°liquid | -1462.69 ± 0.31 | kcal/mol | Ccb | Johnson, Prosen, et al., 1947 | Corresponding ΔfHºliquid = -66.92 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid | 79.30 | cal/mol*K | N/A | Finke, Messerly, et al., 1976 | DH |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 63.65 | 298.15 | Finke, Messerly, et al., 1976 | T = 10 to 400 K.; 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.
Shtekher, Skuratov, et al., 1959
Shtekher, S.M.; Skuratov, S.M.; Daukshas, V.K.; Levina, R.Ya.,
Heats of combustion of some branched alkanes,
Dokl. Akad. Nauk SSSR, 1959, 127, 812-814. [all data]
Skuratov, Kozina, et al., 1958
Skuratov, S.M.; Kozina, M.P.; Shtocher, S.M.; Prevalova, N.M.; Kamkina, L.S.; Zuko, V.D.,
Heats of combustion of cyclic compounds,
Bull. Chem. Thermodyn., 1958, 1, 21. [all data]
Johnson, Prosen, et al., 1947
Johnson, W.H.; Prosen, E.J.; Rossini, F.D.,
Heats of combustion and isomerization of six nonanes,
J. Res. NBS, 1947, 38, 419-422. [all data]
Finke, Messerly, et al., 1976
Finke, H.L.; Messerly, J.F.; Douslin, D.R.,
Low-temperature thermal quantities for five alkyl-substituted pentanes,
J. Chem. Thermodynam., 1976, 8, 965-983. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions ΔcH°liquid Enthalpy of combustion of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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