Cyclopentane, 1-ethyl-1-methyl-

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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 by: Glushko Thermocenter, Russian Academy of Sciences, Moscow

Constant pressure heat capacity of gas

Cp,gas (cal/mol*K) Temperature (K) Reference
48.423 ± 0.098383.15Hossenlopp I.A., 1981
50.35 ± 0.10398.15
53.32 ± 0.11423.15
56.31 ± 0.11448.15
59.18 ± 0.12473.15
61.98 ± 0.12498.15
64.61 ± 0.13523.15

Condensed 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfliquid-46.31 ± 0.24kcal/molCcrGood, 1971 
Quantity Value Units Method Reference Comment
Δcliquid-1252.62 ± 0.22kcal/molCcrGood, 1971Corresponding Δfliquid = -46.31 kcal/mol (simple calculation by NIST; no Washburn corrections)

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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil394.7 ± 0.2KAVGN/AAverage of 7 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus129.350KN/AStreiff, Murphy, et al., 1947Uncertainty assigned by TRC = 0.1 K; TRC
Quantity Value Units Method Reference Comment
Tc592.KN/AMajer and Svoboda, 1985 
Quantity Value Units Method Reference Comment
Δvap9.30kcal/molN/AMajer and Svoboda, 1985 
Δvap9.27kcal/molCHossenlopp and Scott, 1981AC
Δvap9.30kcal/molN/AReid, 1972AC

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Method Reference Comment
7.93394.7N/AMajer and Svoboda, 1985 
8.77346.AStephenson and Malanowski, 1987Based on data from 331. to 397. K.; AC
9.61273.IPStephenson and Malanowski, 1987Based on data from 238. to 288. K. See also Osborn and Douslin, 1974.; AC
8.91331.N/AForziati, Norris, et al., 1949Based on data from 316. to 396. K.; AC

Enthalpy of vaporization

ΔvapH = A exp(-βTr) (1 − Tr)β
    ΔvapH = Enthalpy of vaporization (at saturation pressure) (kcal/mol)
    Tr = reduced temperature (T / Tc)

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Temperature (K) A (kcal/mol) β Tc (K) Reference Comment
332. to 422.13.250.2801592.Majer and Svoboda, 1985 

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
238. to 435.294.054051394.938-50.638Osborn and Douslin, 1974Coefficents calculated by NIST from author's data.
316.21 to 395.633.986471352.644-55.363Forziati, Norris, et al., 1949, 2Coefficents calculated by NIST from author's data.

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


IR Spectrum

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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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Gas Phase Spectrum

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IR spectrum
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Additional Data

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Owner NIST Standard Reference Data Program
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin NIST Mass Spectrometry Data Center
State gas
Instrument HP-GC/MS/IRD

This IR spectrum is from the NIST/EPA Gas-Phase Infrared Database .


Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Gas Chromatography, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Mass spectrum
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Additional Data

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Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
NIST MS number 1612

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


Gas Chromatography

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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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Kovats' RI, non-polar column, isothermal

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Column type Active phase Temperature (C) I Reference Comment
CapillaryHP-1100.805.Zhang, Li, et al., 1992N2; Column length: 25. m; Column diameter: 0.20 mm
CapillaryHP-1100.805.Zhang, Li, et al., 1992N2; Column length: 25. m; Column diameter: 0.20 mm
CapillarySqualane50.793.1Lunskii and Paizanskaya, 1988He; Column length: 50. m; Column diameter: 0.22 mm
CapillarySqualane70.797.9Lunskii and Paizanskaya, 1988He; Column length: 50. m; Column diameter: 0.22 mm
CapillarySqualane50.794.0Krupcik, Cellar, et al., 1986Column length: 180. m; Column diameter: 0.25 mm
CapillaryDB-160.794.3Lubeck and Sutton, 1983Column length: 60. m; Column diameter: 0.264 mm
CapillaryDB-160.794.6Lubeck and Sutton, 198360. m/0.259 mm/1. μm
CapillarySqualane100.796.1Lulova, Leont'eva, et al., 1976He; Column length: 120. m; Column diameter: 0.25 mm
CapillarySqualane100.796.1Lulova, Leont'eva, et al., 1976He; Column length: 120. m; Column diameter: 0.25 mm
CapillarySqualane100.807.Dielmann, Schwengers, et al., 1974Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane60.797.Dielmann, Schwengers, et al., 1974Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane80.802.Dielmann, Schwengers, et al., 1974Column length: 100. m; Column diameter: 0.25 mm
CapillaryVacuum Grease Oil (VM-4)35.793.Sidorov, Petrova, et al., 1972 
CapillaryVacuum Grease Oil (VM-4)45.796.Sidorov, Petrova, et al., 1972 
CapillaryVacuum Grease Oil (VM-4)50.797.Sidorov, Petrova, et al., 1972 
CapillaryVacuum Grease Oil (VM-4)58.799.Sidorov, Petrova, et al., 1972 
CapillaryVacuum Grease Oil (VM-4)68.802.Sidorov, Petrova, et al., 1972 
CapillarySqualane70.793.Dimov and Schopov, 1971Column length: 100. m; Column diameter: 0.25 mm
PackedVacuum Grease Oil (VM-4)35.793.Sidorov, Ivanova, et al., 1971 
PackedSE-30130.814.Mitra and Saha, 1970N2, Chromosorb W; Column length: 6.1 m

Kovats' RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryApiezon L808.Louis, 1971N2, 1. K/min; Column length: 50. m; Column diameter: 0.25 mm; Tstart: 60. C
CapillaryApiezon L780.Louis, 1971N2, 1. K/min; Column length: 50. m; Column diameter: 0.25 mm; Tstart: 60. C

Kovats' RI, non-polar column, custom temperature program

View large format table.

Column type Active phase I Reference Comment
CapillaryPetrocol DH-100788.8Haagen-Smit Laboratory, 1997He; Column length: 100. m; Column diameter: 0.2 mm; Program: 5C(10min) => 5C/min => 50C(48min) => 1.5C/min => 195C(91min)
CapillaryDB-1789.Hoekman, 199360. m/0.32 mm/1.0 μm, He; Program: -40 C for 12 min; -40 - 125 C at 3 deg.min; 125-185 C at 6 deg/min; 185 - 220 C at 20 deg/min; hold 220 C for 2 min

Van Den Dool and Kratz RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryPetrocol DH792.8Censullo, Jones, et al., 200350. m/0.25 mm/0.5 μm, He, 35. C @ 10. min, 3. K/min, 200. C @ 10. min
CapillarySPB-1785.82LECO Corporation, 200330. m/0.25 mm/0.25 μm, 40. C @ 2. min, 10. K/min, 250. C @ 2. min
CapillarySPB-1786.23LECO Corporation, 200330. m/0.25 mm/0.25 μm, 40. C @ 2. min, 10. K/min, 250. C @ 2. min
CapillaryPetrocol DH790.White, Hackett, et al., 1992100. m/0.25 mm/0.5 μm, He, 1. K/min; Tstart: 30. C; Tend: 220. C

Normal alkane RI, non-polar column, isothermal

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Column type Active phase Temperature (C) I Reference Comment
CapillaryMethyl Silicone50.793.N/AN2; Column length: 74.6 m; Column diameter: 0.28 mm
CapillarySqualane100.805.Krupcik, Cellar, et al., 1986, 2Column length: 180. m; Column diameter: 0.25 mm
CapillarySqualane40.791.Krupcik, Cellar, et al., 1986, 2Column length: 180. m; Column diameter: 0.25 mm
CapillarySqualane70.798.Krupcik, Cellar, et al., 1986, 2Column length: 180. m; Column diameter: 0.25 mm
CapillaryOV-10150.791.Wu and Lu, 1984 
CapillaryOV-10170.796.Wu and Lu, 1984 

Normal alkane RI, non-polar column, temperature ramp

View large format table.

Column type Active phase I Reference Comment
CapillaryPetrocol DH789.Supelco, 2012100. m/0.25 mm/0.50 μm, Helium, 20. C @ 15. min, 15. K/min, 220. C @ 30. min
CapillarySE-54792.Guan, Li, et al., 199560. C @ 2. min, 4. K/min; Column length: 50. m; Column diameter: 0.32 mm; Tend: 200. C
CapillarySqualane793.4Krupcik, Cellar, et al., 19860.1 K/min; Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane794.9Krupcik, Cellar, et al., 19860.2 K/min; Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane797.0Krupcik, Cellar, et al., 19860.4 K/min; Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane798.7Krupcik, Cellar, et al., 19860.6 K/min; Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane800.1Krupcik, Cellar, et al., 19860.8 K/min; Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane801.4Krupcik, Cellar, et al., 19861. K/min; Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane793.Krupcik, Cellar, et al., 1986, 20.1 K/min; Column length: 180. m; Column diameter: 0.25 mm; Tstart: 40. C
CapillarySqualane795.Krupcik, Cellar, et al., 1986, 20.2 K/min; Column length: 180. m; Column diameter: 0.25 mm; Tstart: 40. C
CapillarySqualane798.Krupcik, Cellar, et al., 1986, 20.4 K/min; Column length: 180. m; Column diameter: 0.25 mm; Tstart: 40. C
CapillarySqualane800.Krupcik, Cellar, et al., 1986, 20.6 K/min; Column length: 180. m; Column diameter: 0.25 mm; Tstart: 40. C
CapillarySqualane801.Krupcik, Cellar, et al., 1986, 20.8 K/min; Column length: 180. m; Column diameter: 0.25 mm; Tstart: 40. C
CapillarySqualane803.Krupcik, Cellar, et al., 1986, 21.0 K/min; Column length: 180. m; Column diameter: 0.25 mm; Tstart: 40. C

Normal alkane RI, non-polar column, custom temperature program

View large format table.

Column type Active phase I Reference Comment
CapillarySqualane789.Chen, 2008Program: not specified
CapillarySqualane814.Chen, 2008Program: not specified
CapillaryMethyl Silicone788.Spieksma, 1999Program: not specified

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Hossenlopp I.A., 1981
Hossenlopp I.A., Vapor heat capacities and enthalpies of vaporization of four aromatic and/or cycloalkane hydrocarbons, J. Chem. Thermodyn., 1981, 13, 423-428. [all data]

Good, 1971
Good, W.D., The enthalpies of combustion and formation of n-propylcyclopentane and five methylethylcyclopentanes, J. Chem. Thermodyn., 1971, 3, 97-103. [all data]

Streiff, Murphy, et al., 1947
Streiff, A.J.; Murphy, E.T.; Zimmerman, J.C.; Soule, L.F.; Sedlak, V.A.; Willingham, C.B.; Rossini, F.D., Purification, purity, and freezing points of n-decane, 4 alkylcyclopentanes 9 alkylcyclohexanes, 2 monoolefins, 1,2-butadiene, and 2-butyne of the API-standard and API-NBS series., J. Res. Natl. Bur. Stand. (U. S.), 1947, 39, 321. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Hossenlopp and Scott, 1981
Hossenlopp, I.A.; Scott, D.W., Vapor heat capacities and enthalpies of vaporization of four aromatic and/or cycloalkane hydrocarbons, J. Chem. Thermodyn., 1981, 13, 423-428. [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]

Osborn and Douslin, 1974
Osborn, Ann G.; Douslin, Donald R., Vapor-pressure relations for 15 hydrocarbons, J. Chem. Eng. Data, 1974, 19, 2, 114-117, https://doi.org/10.1021/je60061a022 . [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]

Zhang, Li, et al., 1992
Zhang, M.J.; Li, S.D.; Chen, B.J., Compositional studies of high-temperature coal tar by GC/FTIR analysis of light oil fractions, Chromatographia, 1992, 33, 3/4, 138-146, https://doi.org/10.1007/BF02275894 . [all data]

Lunskii and Paizanskaya, 1988
Lunskii, M.Kh.; Paizanskaya, I.L., Identification of hydrocarbons C1-C9 of petrol fractions of oils and condensates in the use of capillary columns with dinonylphthalate, Zh. Anal. Khim., 1988, 43, 127-135. [all data]

Krupcik, Cellar, et al., 1986
Krupcik, J.; Cellar, P.; Repka, D.; Garaj, J.; Guiochon, G., Use of Kováts retention indices for characterization of solutes in linear temperature-programmed capillary gas-liquid chromatography, J. Chromatogr., 1986, 351, 111-121, https://doi.org/10.1016/S0021-9673(01)83477-4 . [all data]

Lubeck and Sutton, 1983
Lubeck, A.J.; Sutton, DL., Kovats retention indices of selected hydrocarbons through C10 on bonded phase fused silica capillaries, J. Hi. Res. Chromatogr. Chromatogr. Comm., 1983, 6, 6, 328-332, https://doi.org/10.1002/jhrc.1240060612 . [all data]

Lulova, Leont'eva, et al., 1976
Lulova, N.I.; Leont'eva, S.A.; Timofeeva, A.N., Gas-chromatographic method of determination of individual hydrocarbons in catalytic cracking gasolines in Proceedings of All-Union Research Institute on Oil Processes. Vol.18, All-Union Research Institute on Oil Processes, Moscow, 1976, 30-53. [all data]

Dielmann, Schwengers, et al., 1974
Dielmann, G.; Schwengers, D.; Schomburg, G., Gas-chromatographische Retentionsdaten und Strukture chemischer Verbindungen Gesättigte und ungesättigte alkylsubstituierte Cyclopentane und Methylcyclopentane, Chromatographia, 1974, 7, 5, 215-224, https://doi.org/10.1007/BF02321771 . [all data]

Sidorov, Petrova, et al., 1972
Sidorov, R.I.; Petrova, V.I.; Ivanova, M.P., Qualitative analysis of wide-boiling fraction C5-C10 with capillary chromatography in Processes in chromatographic columns. Vol.17, 1972, 14-25. [all data]

Dimov and Schopov, 1971
Dimov, N.; Schopov, D., Empirische korrektion der physikalisch-chemischen retentionsindexe von kohlenwasserstoffen auf squalan, J. Chromatogr., 1971, 63, 223-228, https://doi.org/10.1016/S0021-9673(01)85634-X . [all data]

Sidorov, Ivanova, et al., 1971
Sidorov, R.I.; Ivanova, M.P.; Petrova, V.I., Temperature dependence of cycloalkane's retention and its using in identification of structure, Gazovaya Khromatografiya, 1971, 15, 18-26. [all data]

Mitra and Saha, 1970
Mitra, G.D.; Saha, N.C., Determination of Retention Indices of Saturated Hydrocarbons by Graphical Methods, J. Chromatogr. Sci., 1970, 8, 2, 95-102, https://doi.org/10.1093/chromsci/8.2.95 . [all data]

Louis, 1971
Louis, R., Kovats-index-tafeln zur gaschromatographischen analyse von kohlenwasserstoffgemischen, Erdoel Kohle Erdgas Petrochem., 1971, 24, 2, 88-94. [all data]

Haagen-Smit Laboratory, 1997
Haagen-Smit Laboratory, Procedure for the detailed hydrocarbon analysis of gasolines by single column high efficiency (capillary) column gas chromatography, SOP NO. MLD 118, Revision No. 1.1, California Environmental Protection Agency, Air Resources Board, El Monte, California, 1997, 22. [all data]

Hoekman, 1993
Hoekman, S.K., Improved gas chromatography procedure for speciated hydrocarbon measurements of vehicle emissions, J. Chromatogr., 1993, 639, 2, 239-253, https://doi.org/10.1016/0021-9673(93)80260-F . [all data]

Censullo, Jones, et al., 2003
Censullo, A.C.; Jones, D.R.; Wills, M.T., Speciation of the volatile organic compounds (VOCs) in solventborne aerosol coatings by solid phase microextraction-gas chromatography, J. Coat. Technol., 2003, 75, 936, 47-53, https://doi.org/10.1007/BF02697922 . [all data]

LECO Corporation, 2003
LECO Corporation, Determination of hydrocarbon components in petroleum naphthas, 2003, retrieved from http://www.leco.org/customersupport/apps/separationscience/-190.pdf. [all data]

White, Hackett, et al., 1992
White, C.M.; Hackett, J.; Anderson, R.R.; Kail, S.; Spock, P.S., Linear temperature programmed retention indices of gasoline range hydrocarbons and chlorinated hydrocarbons on cross-linked polydimethylsiloxane, J. Hi. Res. Chromatogr., 1992, 15, 2, 105-120, https://doi.org/10.1002/jhrc.1240150211 . [all data]

Krupcik, Cellar, et al., 1986, 2
Krupcik, J.; Cellar, P.; Repka, D., Analyza cyklickych a aromatickych uhlovodnikov s poctom uhlikovych atomov 8 kapilarnou plynovou chromatografiou, Ropa a Uhlie, 1986, 28, 8, 485-495. [all data]

Wu and Lu, 1984
Wu, J.; Lu, W., Kovats indices of C4-C10 hydrocarbons in apolar quartz capillary OV-101, Chin. J. Chromatogr., 1984, 1, 1, 11-17. [all data]

Supelco, 2012
Supelco, CatalogNo. 24160-U, Petrocol DH Columns. Catalog No. 24160-U, 2012, retrieved from http://www.sigmaaldrich.com/etc/medialib/docs/Supelco/Datasheet/1/w97949.Par.0001.File.tmp/w97949.pdf. [all data]

Guan, Li, et al., 1995
Guan, Y.; Li, L.; Zhou, L., Live retention database for compound identification in capillary gas chromatography, Chin. J. Chromatogr., 1995, 13, 5, 851-857. [all data]

Chen, 2008
Chen, H.-F., Quantitative prediction of gas chromatography retention indices with support vector machines, radial basis neutral networks and multiple linear regression, Anal. Chim. Acta, 2008, 609, 1, 24-36, https://doi.org/10.1016/j.aca.2008.01.003 . [all data]

Spieksma, 1999
Spieksma, W., Determination of vapor liquid equilibrium from the Kovats retention index on dimethylsilicone using the Wilson mixing tool, J. Hi. Res. Chromatogr., 1999, 22, 10, 565-588, https://doi.org/10.1002/(SICI)1521-4168(19991001)22:10<565::AID-JHRC565>3.0.CO;2-2 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References