Butane, 2,2,3,3-tetramethyl-

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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 as indicated in comments:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Δfgas-226.2kJ/molN/AGood, 1972Value computed using ΔfHsolid° value of -269.1±1.2 kj/mol from Good, 1972 and ΔsubH° value of 42.9 kj/mol from Prosen and Rossini, 1945.; DRB
Δfgas-225.9 ± 1.9kJ/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
gas389.3 ± 1.3J/mol*KN/AScott D.W., 1952GT

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
129.87200.Scott D.W., 1974Recommended values were obtained from the consistent correlation scheme for alkanes [ Scott D.W., 1974, 2, Scott D.W., 1974]. This approach gives a good agreement with experimental data available for alkanes. However, large uncertainties could be expected at high temperatures.; GT
172.63273.15
187.2 ± 0.6298.15
188.28300.
244.01400.
293.76500.
337.23600.
375.30700.
409.20800.
438.90900.
465.261000.
488.691100.
509.611200.
527.181300.
543.921400.
560.661500.

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
Δfsolid-269.1 ± 1.2kJ/molCcbGood, 1972ALS
Δfsolid-268.8 ± 1.9kJ/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
Δcsolid-5451.5 ± 1.1kJ/molCcbGood, 1972Corresponding Δfsolid = -269.1 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Δcsolid-5451.9 ± 1.8kJ/molCcbProsen and Rossini, 1945Corresponding Δfsolid = -268.7 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
solid,1 bar273.76J/mol*KN/AScott, Douslin, et al., 1952DH
solid,1 bar256.9J/mol*KN/AParks, Huffman, et al., 1930Extrapolation below 90 K, 64.68 J/mol*K.; DH

Constant pressure heat capacity of solid

Cp,solid (J/mol*K) Temperature (K) Reference Comment
239.62301.60Scott, Douslin, et al., 1952T = 12 to 374 K. Value is unsmoothed experimental datum.; DH
232.2295.4Parks, Huffman, et al., 1930T = 89 to 295 K. Value is unsmoothed experimental datum.; DH

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

Octane = Butane, 2,2,3,3-tetramethyl-

By formula: C8H18 = C8H18

Quantity Value Units Method Reference Comment
Δr-18.8 ± 1.6kJ/molCisoProsen and Rossini, 1945, 2liquid phase; Calculated from ΔHc

References

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

Good, 1972
Good, W.D., The enthalpies of combustion and formation of n-octane and 2,2,3,3-tetramethylbutane, J. Chem. Thermodyn., 1972, 4, 709-714. [all data]

Prosen and Rossini, 1945
Prosen, E.J.; Rossini, F.D., Heats of combustion and formation of the paraffin hydrocarbons at 25° C, J. Res. NBS, 1945, 263-267. [all data]

Scott D.W., 1952
Scott D.W., 2,2,3,3-Tetramethylbutane: heat capacity, heats of transition, fusion and sublimation, vapor pressure, entropy and thermodynamic functions, J. Am. Chem. Soc., 1952, 74, 883-887. [all data]

Scott D.W., 1974
Scott D.W., Chemical Thermodynamic Properties of Hydrocarbons and Related Substances. Properties of the Alkane Hydrocarbons, C1 through C10 in the Ideal Gas State from 0 to 1500 K. U.S. Bureau of Mines, Bulletin 666, 1974. [all data]

Scott D.W., 1974, 2
Scott D.W., Correlation of the chemical thermodynamic properties of alkane hydrocarbons, J. Chem. Phys., 1974, 60, 3144-3165. [all data]

Scott, Douslin, et al., 1952
Scott, D.W.; Douslin, D.R.; Gross, M.E.; Oliver, G.D.; Huffman, H.M., 2,2,3,3-Tetramethylbutane: Heat capacity, heats of transition, fusion and sublimation, vapor pressure, entropy and thermodynamic functions, J. Am. Chem. Soc., 1952, 74, 883-887. [all data]

Parks, Huffman, et al., 1930
Parks, G.S.; Huffman, H.M.; Thomas, S.B., Thermal data on organic compounds. VI. The heat capacities, entropies and free energies of some saturated, non-benzenoid hydrocarbons, J. Am. Chem. Soc., 1930, 52, 1032-1041. [all data]

Prosen and Rossini, 1945, 2
Prosen, E.J.; Rossini, F.D., Heats of isomerization of the 18 octanes, J. Res. NBS, 1945, 34, 163-174. [all data]


Notes

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