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Benzene, hexaethyl-

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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
Deltacsolid-2635.4 ± 1.3kcal/molCcbHoldiness, 1984Hf NR; Corresponding «DELTA»fsolid = -82.23 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Tboil571.2KN/AWeast and Grasselli, 1989BS
Quantity Value Units Method Reference Comment
Tfus402.3KN/AOgimachi, Andrews, et al., 1955Uncertainty assigned by TRC = 1. K; TRC
Tfus400.KN/ALarsen, Thorpe, et al., 1942Uncertainty assigned by TRC = 2. K; TRC
Tfus401.65KN/AMalishev, 1935Uncertainty assigned by TRC = 1. K; TRC
Quantity Value Units Method Reference Comment
Deltasub9.88 ± 0.22kcal/molCHoldiness, 1984Hf NR; ALS

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
15.0422.AStephenson and Malanowski, 1987Based on data from 407. - 572. K. See also Stull, 1947.; AC

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
407.5 - 571.44.622072360.733-60.498Stull, 1947Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

DeltasubH (kcal/mol) Temperature (K) Method Reference Comment
22.7 ± 0.96340.HSAChickos, Annunziata, et al., 1986Based on data from 327. - 352. K.; AC

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:


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: Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard

Ionization energy determinations

IE (eV) Method Reference Comment
7.71PEHowell, Goncalves, et al., 1984Vertical value

Mass spectrum (electron ionization)

Go To: Top, Condensed phase thermochemistry data, Phase change 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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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.
Origin Chemical Concepts
NIST MS number 156789

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Gas Chromatography

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

Kovats' RI, non-polar column, isothermal

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Column type Active phase Temperature (C) I Reference Comment
PackedMethyl Silicone130.1706.Antheaume and Guiochon, 1965 

Kovats' RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryOV-1011682.Hayes and Pitzer, 1982110. m/0.25 mm/0.20 «mu»m, He, 1. K/min; Tstart: 35. C; Tend: 200. C

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

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Column type Active phase I Reference Comment
CapillaryPetrocol DH1699.White, Hackett, et al., 1992100. m/0.25 mm/0.5 «mu»m, He, 1. K/min; Tstart: 30. C; Tend: 220. C
CapillaryOV-1011682.Hayes and Pitzer, 1981108. m/0.25 mm/0.2 «mu»m, 1. K/min; Tstart: 35. C; Tend: 200. C

Normal alkane RI, non-polar column, isothermal

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Column type Active phase Temperature (C) I Reference Comment
CapillarySE-30100.1658.Vodenkova, Leol'ko, et al., 2005He; Column length: 50. m; Column diameter: 0.25 mm

Normal alkane RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryPetrocol DH1689.Supelco, 2012100. m/0.25 mm/0.50 «mu»m, Helium, 20. C @ 15. min, 15. K/min, 220. C @ 30. min

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

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Column type Active phase I Reference Comment
CapillaryOV-1, SE-30, Methyl silicone, SP-2100, OV-101, DB-1, etc.1682.Waggott and Davies, 1984Hydrogen; Column length: 50. m; Column diameter: 0.32 mm; Program: not specified

References

Go To: Top, Condensed phase thermochemistry data, Phase change 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.

Holdiness, 1984
Holdiness, M.R., Resonance energy of hexaethylbenzene and hexamethylbenzene, Thermochim. Acta, 1984, 78, 435-436. [all data]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Ogimachi, Andrews, et al., 1955
Ogimachi, N.N.; Andrews, L.J.; Keefer, R.M., The Free Energies and Heats of Formation of Polyalkoxybenzene-Iodine Monochloride Complexes, J. Am. Chem. Soc., 1955, 77, 4202. [all data]

Larsen, Thorpe, et al., 1942
Larsen, R.G.; Thorpe, R.E.; Armfield, F.A., Oxidation Characteristics of Pure Hydrocarbons, Ind. Eng. Chem., 1942, 34, 183. [all data]

Malishev, 1935
Malishev, B.W., Direct Alkylation of Aromatic Hydrocarbons by Olefins Under Catalytic Influence of Phosphorous Pentoxide, J. Am. Chem. Soc., 1935, 57, 883. [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]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Chickos, Annunziata, et al., 1986
Chickos, J.S.; Annunziata, R.; Ladon, L.H.; Hyman, A.S.; Liebman, J.F., Estimating heats of sublimation of hydrocarbons. A semiempirical approach, J. Org. Chem., 1986, 51, 4311-4314. [all data]

Howell, Goncalves, et al., 1984
Howell, J.O.; Goncalves, J.M.; Amatore, C.; Klasinc, L.; Wightman, R.M.; Kochi, J.K., Electron transfer from aromatic hydrocarbons and their «pi»-complexes with metals. Comparison of the standard oxidation potentials and vertical ionization potentials, J. Am. Chem. Soc., 1984, 106, 3968. [all data]

Antheaume and Guiochon, 1965
Antheaume, J.; Guiochon, G., Application de la chromatographie en phase gazeuse à l'étude de la composition des fractions moyennes d'un brut pétrolier, Bull. Soc. Chim. Fr., 1965, 2, 298-307. [all data]

Hayes and Pitzer, 1982
Hayes, P.C., Jr.; Pitzer, E.W., Characterizing petroleum- and shale-derived jet fuel distillates via temperature-programmed Kováts indices, J. Chromatogr., 1982, 253, 179-198, https://doi.org/10.1016/S0021-9673(01)88376-X . [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]

Hayes and Pitzer, 1981
Hayes, P.C., Jr.; Pitzer, E.W., Kovats indices as a tool in characterizing hydrocarbon fuels in temperature programmed glass capillary gas chromatography. Part 1. Qualitative identification, Inhouse rpt. for Air Force Wright Aeronautical Labs., Air Force Wright Aeronautical Labs., Wright-Patterson AFB, Ohio, 1981, 75. [all data]

Vodenkova, Leol'ko, et al., 2005
Vodenkova, N.N.; Leol'ko, A.S.; Nesterova, T.N.; Levanova, S.V., Kovats indices and normal boiling points of alkylbenzenes, Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol., 2005, 48, 10, 33-39. [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]

Waggott and Davies, 1984
Waggott, A.; Davies, I.W., Identification of organic pollutants using linear temperature programmed retention indices (LTPRIs) - Part II, 1984, retrieved from http://dwi.defra.gov.uk/research/completed-research/reports/dwi0383.pdf. [all data]


Notes

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