Cyclopentane, 1,3-dimethyl-, trans-
- Formula: C7H14
- Molecular weight: 98.1861
- IUPAC Standard InChIKey: XAZKFISIRYLAEE-BQBZGAKWSA-N
- CAS Registry Number: 1759-58-6
- 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: trans-1,3-Dimethylcyclopentane; 1,trans-3-Dimethylcyclopentane; 1,3-Dimethylcyclopentane, trans; t-1,3-Dimethylcyclopentane
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, 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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | -135.9 ± 1.2 | kJ/mol | Cm | Johnson, Prosen, et al., 1949 | ALS |
Constant pressure heat capacity of gas
Cp,gas (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
44.79 | 50. | Thermodynamics Research Center, 1997 | p=1 bar. Recommended values are in close agreement with those calculated by a method of increments [ Epstein M.B., 1949] at low temperatures. Discrepancies increase up to 2-4 J/mol*K at T=1500 K.; GT |
58.22 | 100. | ||
74.17 | 150. | ||
91.53 | 200. | ||
122.7 | 273.15 | ||
134.5 | 298.15 | ||
135.4 | 300. | ||
183.2 | 400. | ||
225.8 | 500. | ||
261.3 | 600. | ||
290.9 | 700. | ||
315.9 | 800. | ||
337.2 | 900. | ||
355.5 | 1000. | ||
371.1 | 1100. | ||
384.6 | 1200. | ||
396.3 | 1300. | ||
406.4 | 1400. | ||
415.1 | 1500. | ||
432.4 | 1750. | ||
444.9 | 2000. | ||
454.1 | 2250. | ||
461.0 | 2500. | ||
466.4 | 2750. | ||
470.6 | 3000. |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, 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 | -170.2 ± 1.2 | kJ/mol | Cm | Johnson, Prosen, et al., 1949 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -4585.2 ± 1.1 | kJ/mol | Cm | Johnson, Prosen, et al., 1949 | Corresponding ΔfHºliquid = -170.1 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 271.54 | J/mol*K | N/A | Gross, Oliver, et al., 1953 | DH |
Constant pressure heat capacity of liquid
Cp,liquid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
190.87 | 304.03 | Gross, Oliver, et al., 1953 | T = 13 to 300 K. Unsmoothed experimental datum.; DH |
Phase change data
Go To: Top, Gas phase thermochemistry data, 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:
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
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 364. ± 1. | K | AVG | N/A | Average of 12 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 136. ± 9. | K | AVG | N/A | Average of 9 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 139.350 | K | N/A | Huffman, 1948 | Uncertainty assigned by TRC = 0.05 K; originally mis-identified as cis-1,3-dimethylcyclopentane; TRC |
Ttriple | 139.260 | K | N/A | Huffman, 1948 | Uncertainty assigned by TRC = 0.03 K; originally mis-identified as cis-1,3-dimethylcyclopentane; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 34.5 | kJ/mol | N/A | Reid, 1972 | AC |
ΔvapH° | 34.3 | kJ/mol | N/A | Johnson, Prosen, et al., 1949 | DRB |
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
34.0 | 310. | A | Stephenson and Malanowski, 1987 | Based on data from 295. to 367. K.; AC |
34.2 | 306. | N/A | Forziati, Norris, et al., 1949 | Based on data from 291. to 365. K.; AC |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
291. to 364.82 | 3.97303 | 1243.686 | -50.438 | Forziati, Norris, et al., 1949, 2 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
7.3981 | 139.48 | Gross, Oliver, et al., 1953 | DH |
7.41 | 139.5 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
53.04 | 139.48 | Gross, Oliver, et al., 1953 | DH |
References
Go To: Top, Gas phase thermochemistry data, 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.
Johnson, Prosen, et al., 1949
Johnson, W.H.; Prosen, E.J.; Rossini, F.D.,
Heats of combustion and isomerization of the six C7H14 alkylcyclopentanes,
J. Res. NBS, 1949, 42, 251-255. [all data]
Thermodynamics Research Center, 1997
Thermodynamics Research Center,
Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]
Epstein M.B., 1949
Epstein M.B.,
Heats, equilibrium constants, and free energies of formation of the dimethylcyclopentanes,
J. Res. Nat. Bur. Stand., 1949, 43, 245-250. [all data]
Gross, Oliver, et al., 1953
Gross, M.E.; Oliver, G.D.; Huffman, H.M.,
Low-temperature thermal data for some C7H14 alkylcyclopentanes,
J. Am. Chem. Soc., 1953, 75, 2801-2804. [all data]
Huffman, 1948
Huffman, H.M.,
Personal Commun., U. S. Bur. Mines, Bartlesville, OK, 1948. [all data]
Reid, 1972
Reid, Robert C.,
Handbook on vapor pressure and heats of vaporization of hydrocarbons and related compounds, R. C. Wilhort and B. J. Zwolinski, Texas A Research Foundation. College Station, Texas(1971). 329 pages.$10.00,
AIChE J., 1972, 18, 6, 1278-1278, https://doi.org/10.1002/aic.690180637
. [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]
Forziati, Norris, et al., 1949
Forziati, Alphonse F.; Norris, William R.; Rossini, Frederick D.,
Vapor pressures and boiling points of sixty API-NBS hydrocarbons,
J. RES. NATL. BUR. STAN., 1949, 43, 6, 555-17, https://doi.org/10.6028/jres.043.050
. [all data]
Forziati, Norris, et al., 1949, 2
Forziati, A.F.; Norris, W.R.; Rossini, F.D.,
Vapor Pressures and Boiling Points of Sixty API-NBS Hydrocarbons,
J. Res. Natl. Bur. Stand. (U.S.), 1949, 43, 6, 555-563, https://doi.org/10.6028/jres.043.050
. [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, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas Cp,liquid Constant pressure heat capacity of liquid S°liquid Entropy of liquid at standard conditions Tboil Boiling point Tfus Fusion (melting) point Ttriple Triple point temperature ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions 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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