Cyclopentane, 1,2-dimethyl-, cis-
- Formula: C7H14
- Molecular weight: 98.1861
- IUPAC Standard InChIKey: RIRARCHMRDHZAR-KNVOCYPGSA-N
- CAS Registry Number: 1192-18-3
- 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: cis-1,2-Dimethylcyclopentane; 1,cis-2-Dimethylcyclopentane; 1,2-Dimethyl- cis-cyclopentane; 1,2-Dimethylcyclopentane, cis; 1-c-2-Dimethylcyclopentane; c-1,2-Dimethylcyclopentane
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Gas 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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | -30.96 ± 0.32 | kcal/mol | Cm | Johnson, Prosen, et al., 1949 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°gas | 87.510 | cal/mol*K | N/A | Stull D.R., 1969 | This value was obtained using low temperature data of [ Gross M.E., 1953].; GT |
Constant pressure heat capacity of gas
Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
10.69 | 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 |
14.74 | 100. | ||
18.33 | 150. | ||
22.15 | 200. | ||
29.28 | 273.15 | ||
32.05 | 298.15 | ||
32.27 | 300. | ||
43.59 | 400. | ||
53.82 | 500. | ||
62.38 | 600. | ||
69.50 | 700. | ||
75.50 | 800. | ||
80.62 | 900. | ||
84.99 | 1000. | ||
88.74 | 1100. | ||
91.97 | 1200. | ||
94.74 | 1300. | ||
97.16 | 1400. | ||
99.24 | 1500. | ||
103.4 | 1750. | ||
106.4 | 2000. | ||
108.6 | 2250. | ||
110.2 | 2500. | ||
111.5 | 2750. | ||
112.5 | 3000. |
References
Go To: Top, Gas phase thermochemistry 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]
Stull D.R., 1969
Stull D.R., Jr.,
The Chemical Thermodynamics of Organic Compounds. Wiley, New York, 1969. [all data]
Gross M.E., 1953
Gross M.E.,
Low-temperature thermal data for some C7H14 alkylcyclopentanes,
J. Am. Chem. Soc., 1953, 75, 2801-2804. [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]
Notes
Go To: Top, Gas phase thermochemistry data, References
- Symbols used in this document:
Cp,gas Constant pressure heat capacity of gas S°gas Entropy of gas at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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