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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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
DRB - Donald R. Burgess, Jr.
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 | 372.5 ± 0.3 | K | AVG | N/A | Average of 13 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 230. ± 70. | K | AVG | N/A | Average of 9 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 219.45 | K | N/A | Gross, Oliver, et al., 1953 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.05 K; TRC |
Ttriple | 219.430 | K | N/A | Huffman, 1948 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.06 K; TRC |
Ttriple | 219.430 | K | N/A | Huffman, 1948 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.04 K; TRC |
Ttriple | 219.430 | K | N/A | Huffman, 1947 | Crystal phase 1 phase; Uncertainty assigned by TRC = 0.04 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 8.56 | kcal/mol | N/A | Reid, 1972 | AC |
ΔvapH° | 8.58 | kcal/mol | N/A | Johnson, Prosen, et al., 1949 | DRB |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
8.48 | 308. | A | Stephenson and Malanowski, 1987 | Based on data from 293. to 375. K.; AC |
8.41 | 313. | N/A | Forziati, Norris, et al., 1949 | Based on data from 298. to 373. K.; AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
0.397 | 219.4 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
11.24 | 141.5 | Domalski and Hearing, 1996 | CAL |
1.80 | 219.4 |
Enthalpy of phase transition
ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
1.5939 | 141.50 | crystaline, II | crystaline, I | Gross, Oliver, et al., 1953, 2 | DH |
0.39610 | 219.45 | crystaline, I | liquid | Gross, Oliver, et al., 1953, 2 | DH |
Entropy of phase transition
ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
11.26 | 141.50 | crystaline, II | crystaline, I | Gross, Oliver, et al., 1953, 2 | DH |
1.80 | 219.45 | crystaline, I | liquid | Gross, Oliver, et al., 1953, 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.
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. [all data]
Huffman, 1948
Huffman, H.M.,
Personal Commun., U. S. Bur. Mines, Bartlesville, OK, 1948. [all data]
Huffman, 1947
Huffman, H.M.,
Personal Communication, U. S. Bur. Mines, Bartlesville, OK, 1947. [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]
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]
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]
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]
Gross, Oliver, et al., 1953, 2
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]
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 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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