Heptane, 2,2,4,6,6-pentamethyl-

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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: Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference
350.98298.15Costas, Huu, et al., 1988
350.98298.15Perez-Casas, Aicart, et al., 1988

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
Tboil451. ± 2.KAVGN/AAverage of 8 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus206. ± 3.KAVGN/AAverage of 9 values; Individual data points
Quantity Value Units Method Reference Comment
Δvap48.97kJ/molN/AMajer and Svoboda, 1985 
Δvap49.0 ± 0.2kJ/molCMelaugh, Mansson, et al., 1976AC

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

Dodecane = Heptane, 2,2,4,6,6-pentamethyl-

By formula: C12H26 = C12H26

Quantity Value Units Method Reference Comment
Δr-12.7kJ/molCcbMelaugh, Mansson, et al., 1976liquid phase; Unpublished results of Zwolinski and Desai
Δr-12.2 ± 1.4kJ/molCcbMelaugh, Mansson, et al., 1976liquid phase

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 Sadtler Research Labs Under US-EPA Contract
State gas

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


References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Notes

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

Costas, Huu, et al., 1988
Costas, M.; Huu, V.T.; Patterson, D.; Caceres-Alonso, M.; Tardajos, G.; Aicart, E., Liquid structure and second-order mixing functions for l-chloronaphthalene with linear and branched alkanes, J. Chem. Soc., Faraday Trans., 1988, 1 84(5), 1603-1616. [all data]

Perez-Casas, Aicart, et al., 1988
Perez-Casas, S.; Aicart, E.; Trojo, L.M.; Costas, M., Excess heat capacity. Chlorobenzene-2,2,4,4,6,8,8-heptamethylnonane, Int. Data Ser., Sel. Data Mixtures, 1988, (2)A, 123. [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]

Melaugh, Mansson, et al., 1976
Melaugh, R.A.; Mansson, M.; Rossini, F.D., The energy of isomerization of n-dodecane into 2,2,4,6,6-pentamethylheptane, J. Chem. Thermodyn., 1976, 8, 623-626. [all data]


Notes

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