2-Butene, 2,3-dimethyl-
- Formula: C6H12
- Molecular weight: 84.1595
- IUPAC Standard InChI: InChI=1S/C6H12/c1-5(2)6(3)4/h1-4H3
- IUPAC Standard InChIKey: WGLLSSPDPJPLOR-UHFFFAOYSA-N
- CAS Registry Number: 563-79-1
- 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: Tetramethylethylene; 1,1,2,2-Tetramethylethylene; 2,3-Dimethyl-2-butene; 2,3-Dimethylbut-2-ene; 2,3-Dimethylbutene-2; (CH3)2C=C(CH3)2; Tetramethylethene
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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 |
|---|---|---|---|---|---|
| ΔfH°liquid | -24.60 ± 0.35 | kcal/mol | Eqk | Wiberg and Hao, 1991 | Heat of hydration; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid | 64.579 | cal/mol*K | N/A | Scott, Finke, et al., 1955 | DH |
| S°liquid | 65.11 | cal/mol*K | N/A | Parks, Todd, et al., 1936 | Extrapolation below 90 K, 58.45 J/mol*K.; DH |
Constant pressure heat capacity of liquid
| Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 41.750 | 298.15 | Scott, Finke, et al., 1955 | T = 10 to 320 K.; DH |
| 42.000 | 295.5 | Parks, Todd, et al., 1936 | T = 83 to 296 K. Value is unsmoothed experimental datum.; 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.
Wiberg and Hao, 1991
Wiberg, K.B.; Hao, S.,
Enthalpies of hydration of alkenes. 4. Formation of acyclic tert-alcohols,
J. Org. Chem., 1991, 56, 5108-5110. [all data]
Scott, Finke, et al., 1955
Scott, D.W.; Finke, H.L.; McCullough, J.P.; Gross, M.E.; Messerly, J.F.; Pennington, R.E.; Waddington, G.,
2,3-Dimethyl-2-butene: Thermodynamic properties in the solid, liquid and vapor states,
J. Am. Chem. Soc., 1955, 77, 4993-4998. [all data]
Parks, Todd, et al., 1936
Parks, G.S.; Todd, S.S.; Shomate, C.H.,
Thermal data on organic compounds. XVII. Some heat capacity, entropy and free energy data for five higher olefins,
J. Am. Chem. Soc., 1936, 58, 2505-2508. [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 ΔfH°liquid Enthalpy of formation of liquid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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