Cycloheptene
- Formula: C7H12
- Molecular weight: 96.1702
- IUPAC Standard InChI: InChI=1S/C7H12/c1-2-4-6-7-5-3-1/h1-2H,3-7H2
- IUPAC Standard InChIKey: ZXIJMRYMVAMXQP-UHFFFAOYSA-N
- CAS Registry Number: 628-92-2
- 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. - Species with the same structure:
- Other names: (Z)-Cycloheptene; UN 2242; Cycloheptene(Z)
- Information on this page:
- Other data available:
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Phase change 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
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 |
|---|---|---|---|---|---|
| Tboil | 387. ± 2. | K | AVG | N/A | Average of 7 values; Individual data points |
| Quantity | Value | Units | Method | Reference | Comment |
| Tfus | 217. | K | N/A | Haines and Gilson, 1990 | Crystal phase 1 phase; Uncertainty assigned by TRC = 1. K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| Ttriple | 217.55 | K | N/A | Lebedev and Smirnova, 1989 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.01 K; TRC |
Enthalpy of vaporization
| ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 38.5 | 266. | A | Stephenson and Malanowski, 1987 | Based on data from 251. to 313. K. See also Lister, 1941.; AC |
| 36.73 | 300. | V | Lister, 1941 | Heat of bromination at 300 K; ALS |
| 36.7 | 300. | N/A | Lister, 1941 | Based on data from 251. to 312. K.; AC |
Enthalpy of fusion
| ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 0.97 | 217. | Domalski and Hearing, 1996 | See also Lebedev and Smirnova, 1994.; AC |
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 5.280 | 154. | crystaline, III | crystaline, II | Haines and Gilson, 1990, 2 | DH |
| 0.710 | 210. | crystaline, II | crystaline, I | Haines and Gilson, 1990, 2 | DH |
| 0.970 | 217. | crystaline, I | liquid | Haines and Gilson, 1990, 2 | DH |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 34.3 | 154. | crystaline, III | crystaline, II | Haines and Gilson, 1990, 2 | DH |
| 3.4 | 210. | crystaline, II | crystaline, I | Haines and Gilson, 1990, 2 | DH |
| 4.5 | 217. | crystaline, I | liquid | Haines and Gilson, 1990, 2 | DH |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Haines and Gilson, 1990
Haines, J.; Gilson, D.F.R.,
Phase transisions in solid cycloheptene,
Can. J. Chem., 1990, 68, 604. [all data]
Lebedev and Smirnova, 1989
Lebedev, B.V.; Smirnova, N.N.,
Thermodynamics of cis-cycloheptene at 0-310 K,
Zh. Fiz. Khim., 1989, 63, 1444. [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]
Lister, 1941
Lister, M.W.,
Heats of organic reactions. X. Heats of bromination of cyclic olefins,
J. Am. Chem. Soc., 1941, 63, 143-149. [all data]
Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D.,
Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III,
J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985
. [all data]
Lebedev and Smirnova, 1994
Lebedev, B.; Smirnova, N.,
Themodynamics of cycloalkenes, of their bulk polymerization in the presence of matathesis catalysts and of polyalkenes,
Macromol. Chem. Phys., 1994, 195, 35-63. [all data]
Haines and Gilson, 1990, 2
Haines, J.; Gilson, D.F.R.,
Phase transitions in solid cycloheptene,
Can. J. Chem., 1990, 68(4), 604-611. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tboil Boiling point Tfus Fusion (melting) point Ttriple Triple point temperature ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔfusH Enthalpy of fusion ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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