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Cyclopentane, ethylidene-

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

Quantity Value Units Method Reference Comment
Deltafgas-4.78kcal/molChydAllinger, Dodziuk, et al., 1982 

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 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
Deltafliquid-13.58 ± 0.21kcal/molCcbLabbauf and Rossini, 1961ALS
Quantity Value Units Method Reference Comment
Deltacliquid-1054.69 ± 0.19kcal/molCcbLabbauf and Rossini, 1961Corresponding «DELTA»fliquid = -13.56 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
43.31298.15Fuchs and Peacock, 1979DH

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
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Tboil380. ± 20.KAVGN/AAverage of 9 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus146.57KN/AStreiff, Schultz, et al., 1960Uncertainty assigned by TRC = 0.02 K; TRC
Tfus146.550KN/AAnonymous, 1956Uncertainty assigned by TRC = 0.05 K; TRC
Tfus146.570KN/AAnonymous, 1956Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Deltavap9.23 ± 0.06kcal/molCFuchs and Peacock, 1979ALS

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:


Reaction 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

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Hydrogen + Cyclopentane, ethylidene- = Cyclopentane, ethyl-

By formula: H2 + C7H12 = C7H14

Quantity Value Units Method Reference Comment
Deltar-25.6 ± 0.1kcal/molChydAllinger, Dodziuk, et al., 1982liquid phase; solvent: Hexane
Deltar-24.2 ± 0.2kcal/molChydRogers and McLafferty, 1971liquid phase; solvent: Hydrocarbon
Deltar-24.88 ± 0.12kcal/molChydTurner and Garner, 1958liquid phase; solvent: Acetic acid
Deltar-24.88 ± 0.12kcal/molChydTurner and Garner, 1957liquid phase; solvent: Acetic acid

Gas phase ion energetics 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: Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C7H12+ (ion structure unspecified)

Ionization energy determinations

IE (eV) Method Reference
8.51PEDemeo and Yencha, 1970
8.49 ± 0.02PIDemeo and El-Sayed, 1970

Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, 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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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 845

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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

View large format table.

Column type Active phase Temperature (C) I Reference Comment
CapillarySqualane50.766.9Bajus, Veselý, et al., 1979Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane70.770.3Bajus, Veselý, et al., 1979Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane100.776.Dielmann, Schwengers, et al., 1974Column length: 100. m; Column diameter: 0.25 mm
CapillarySqualane80.772.Dielmann, Schwengers, et al., 1974Column length: 100. m; Column diameter: 0.25 mm
PackedSqualane27.763.Hively and Hinton, 1968He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm
PackedSqualane49.768.Hively and Hinton, 1968He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm
PackedSqualane67.771.Hively and Hinton, 1968He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm
PackedSqualane86.774.Hively and Hinton, 1968He, Chromosorb P; Column length: 15. m; Column diameter: 0.25 mm

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

View large format table.

Column type Active phase I Reference Comment
CapillarySqualane772.Chen, 2008Program: not specified

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, 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.

Allinger, Dodziuk, et al., 1982
Allinger, N.L.; Dodziuk, H.; Rogers, D.W.; Naik, S.N., Heats of hydrogenation and formation of some 5-membered ring compounds by molecular mechanics calculations and direct measurements, Tetrahedron, 1982, 38, 1593-1597. [all data]

Labbauf and Rossini, 1961
Labbauf, A.; Rossini, F.D., Heats of combustion, formation, and hydrogenation of 14 selected cyclomonoolefin hydrocarbons, J. Phys. Chem., 1961, 65, 476-480. [all data]

Fuchs and Peacock, 1979
Fuchs, R.; Peacock, L.A., Heats of vaporization and gaseous heats of formation of some five- and six-membered ring alkenes, Can. J. Chem., 1979, 57, 2302-2304. [all data]

Streiff, Schultz, et al., 1960
Streiff, A.J.; Schultz, L.H.; Krouskop, N.C.; Moore, J.W.; Rossini, F.D., Purification, Purity, and Freezing Points of 16 API Standard and API Research Hydrocarbons, J. Chem. Eng. Data, 1960, 5, 193-5. [all data]

Anonymous, 1956
Anonymous, R., , Physical Properties of Chemical Substances, Dow Chemical Company, 1956. [all data]

Rogers and McLafferty, 1971
Rogers, D.W.; McLafferty, F.J., A new hydrogen calorimeter. Heats of hydrogenation of allyl and vinyl unsaturation adjacent to a ring, Tetrahedron, 1971, 27, 3765-3775. [all data]

Turner and Garner, 1958
Turner, R.B.; Garner, R.H., Heats of hydrogenation. V. Relative stabilities in certain exocyclic-endocyclic olefin pairs, J. Am. Chem. Soc., 1958, 80, 1424-1430. [all data]

Turner and Garner, 1957
Turner, R.B.; Garner, R.H., Heats of hydrogenation. V. Relative stabilities in certain exocyclic-endocyclic olefin pairs, J. Am. Chem. Soc., 1957, 80, 1424-1430. [all data]

Demeo and Yencha, 1970
Demeo, D.A.; Yencha, A.J., Photoelectron spectra of bicyclic and exocyclic olefins, J. Chem. Phys., 1970, 53, 4536. [all data]

Demeo and El-Sayed, 1970
Demeo, D.A.; El-Sayed, M.A., Ionization potential and structure of olefins, J. Chem. Phys., 1970, 52, 2622. [all data]

Bajus, Veselý, et al., 1979
Bajus, M.; Veselý, V.; Leclercq, P.A.; Rijks, J.A., Steam cracking of hydrocarbons. 2. Pyrolysis of methylcyclohexane, Ind. Eng. Chem. Prod. Res. Dev., 1979, 18, 2, 135-142, https://doi.org/10.1021/i360070a012 . [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]

Hively and Hinton, 1968
Hively, R.A.; Hinton, R.E., Variation of the retention index with temperature on squalane substrates, J. Gas Chromatogr., 1968, 6, 4, 203-217, https://doi.org/10.1093/chromsci/6.4.203 . [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]


Notes

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