Cyclopentene, 3-methyl-
- Formula: C6H10
- Molecular weight: 82.1436
- IUPAC Standard InChI: InChI=1S/C6H10/c1-6-4-2-3-5-6/h2,4,6H,3,5H2,1H3
- IUPAC Standard InChIKey: CXOZQHPXKPDQGT-UHFFFAOYSA-N
- CAS Registry Number: 1120-62-3
- 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. - Stereoisomers:
- Other names: 3-Methylcyclopentene; 3-Methylcyclopentene-1; 3-Methyl-1-cyclopentene
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Condensed phase thermochemistry data
Go To: Top, Phase change 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°liquid | -24.9 ± 1.8 | kJ/mol | Ccb | Labbauf and Rossini, 1961 | Reanalyzed by Cox and Pilcher, 1970, Original value = -23.8 ± 0.63 kJ/mol; ALS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔcH°liquid | -3766.5 ± 0.54 | kJ/mol | Ccb | Labbauf and Rossini, 1961 | Corresponding ΔfHºliquid = -23.7 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of liquid
| Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 152.3 | 298.15 | Fuchs and Peacock, 1979 | DH |
Phase change 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
DRB - Donald R. Burgess, Jr.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tboil | 339. ± 3. | K | AVG | N/A | Average of 12 values; Individual data points |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔvapH° | 31.0 ± 0.3 | kJ/mol | C | Fuchs and Peacock, 1979 | ALS |
| ΔvapH° | 31.0 ± 0.2 | kJ/mol | GCC | Fuchs and Peacock, 1979 | AC |
| ΔvapH° | 32. ± 2. | kJ/mol | V | Labbauf and Rossini, 1961 | Heat of formation derived by Cox and Pilcher, 1970; ALS |
| ΔvapH° | 32.9 | kJ/mol | N/A | Labbauf and Rossini, 1961 | DRB |
Enthalpy of vaporization
| ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 32.1 | 278. | A | Stephenson and Malanowski, 1987 | Based on data from 263. to 392. K. See also Dykyj, 1972.; AC |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Labbauf and Rossini, 1961
Labbauf, A.; Rossini, F.D.,
Heats of combustion, formation, and hydrogenation of 14 selected cyclomonoolefin hydrocarbons,
J. Phys. Chem., 1961, 65, 476-480. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
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]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Dykyj, 1972
Dykyj, J.,
Petrochemia, 1972, 12, 1, 13. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid Tboil Boiling point ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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