1,3,5-Cycloheptatriene
- Formula: C7H8
- Molecular weight: 92.1384
- IUPAC Standard InChIKey: CHVJITGCYZJHLR-UHFFFAOYSA-N
- CAS Registry Number: 544-25-2
- 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. - Other names: Tropilidene; Cyclohepta-1,3,5-triene; Cycloheptatriene; Tropilidin; UN 2603
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Phase change 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:
BS - Robert L. Brown and Stephen E. Stein
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
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 389.7 | K | N/A | Aldrich Chemical Company Inc., 1990 | BS |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 197.92 | K | N/A | McCullough and Waddington, 1957 | Uncertainty assigned by TRC = 0.07 K; IPTS-48; TRC |
Ttriple | 197.91 | K | N/A | Finke, Scott, et al., 1956 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.07 K; TRC |
Ttriple | 197.92 | K | N/A | Finke, Scott, et al., 1956 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.05 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 9.250 ± 0.050 | kcal/mol | V | Finke, Scott, et al., 1956, 2 | ALS |
ΔvapH° | 9.25 ± 0.05 | kcal/mol | N/A | Finke, Scott, et al., 1956, 3 | AC |
Reduced pressure boiling point
Tboil (K) | Pressure (atm) | Reference | Comment |
---|---|---|---|
390.2 | 0.986 | Weast and Grasselli, 1989 | BS |
333.7 | 0.161 | Weast and Grasselli, 1989 | BS |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
9.75 | 288. | A | Stephenson and Malanowski, 1987 | Based on data from 273. to 338. K. See also Kkykj and Repas, 1973.; AC |
9.42 | 288. | A,EB | Stephenson and Malanowski, 1987 | Based on data from 273. to 416. K. See also Finke, Scott, et al., 1956, 3.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
273. to 338. | 4.17940 | 1422.104 | -48.151 | Finke, Scott, et al., 1956, 3 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
0.277 | 198. | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
3.642 | 154.0 | Domalski and Hearing, 1996 | CAL |
1.40 | 198.0 |
Enthalpy of phase transition
ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
0.56090 | 153.98 | crystaline, II | crystaline, I | Finke, Scott, et al., 1956, 3 | DH |
0.27739 | 197.92 | crystaline, I | liquid | Finke, Scott, et al., 1956, 3 | DH |
Entropy of phase transition
ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
3.642 | 153.98 | crystaline, II | crystaline, I | Finke, Scott, et al., 1956, 3 | DH |
1.40 | 197.92 | crystaline, I | liquid | Finke, Scott, et al., 1956, 3 | 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.
Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc.,
Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]
McCullough and Waddington, 1957
McCullough, J.P.; Waddington, G.,
Melting-point purity determinations: limitations as evidenced by calorimetric studies in the melting region,
Anal. Chim. Acta, 1957, 17, 80. [all data]
Finke, Scott, et al., 1956
Finke, H.L.; Scott, D.W.; Gross, M.E.; Messerly, J.F.; Waddington, G.,
Cycloheptane, Cyclooctane and 1,3,5-Cycloheptatriene. Low Temperature Thermal Properties, Vapor Pressure and Derived Chemical Thermodynamic Prop.,
J. Am. Chem. Soc., 1956, 78, 5469. [all data]
Finke, Scott, et al., 1956, 2
Finke, H.L.; Scott, D.W.; Gross, M.E.; Messerly, J.F.; Waddington, G.,
Cycloheptane, cyclooctane and 1,3,5-cycloheptatriene. Low temperature thermal properties, vapor pressure and derived chemical thermodynamic properties,
J. Am. Chem. Soc., 1956, 78, 5469-54. [all data]
Finke, Scott, et al., 1956, 3
Finke, H.L.; Scott, D.W.; Gross, M.E.; Messerly, J.F.; Waddington, G.,
Cycloheptane, cyclooctane and 1,3,5-cycloheptatriene. Low temperature thermal properties, vapor pressure and derived chemical thermodynamic properties,
J. Am. Chem. Soc., 1956, 78, 5469-5476. [all data]
Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [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]
Kkykj and Repas, 1973
Kkykj, J.; Repas, M.,
Petrochemia, 1973, 13, 179. [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]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Tboil Boiling point Ttriple Triple point temperature ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion 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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