Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

Butane, 2,2-dimethyl-

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, References, Notes

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
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Deltafgas-185.6 ± 0.96kJ/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
gas358.65 ± 0.84J/mol*KN/AKilpatrick J.E., 1946The entropy values S(296.05 K)=357.19 and S(322.85 K)=369.87 J/mol*K were calculated by [ Scott D.W., 1974] from the experimental data [ Douslin D.R., 1946].; GT

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
101.46200.Scott D.W., 1974, 2Recommended values were obtained from the consistent correlation scheme for alkanes [ Scott D.W., 1974, Scott D.W., 1974, 2]. This approach gives a better agreement with experimental data than the statistical thermodynamics calculation [ Pitzer K.S., 1946] (see also [ Waddington G., 1949]).; GT
131.08273.15
141.5 ± 0.3298.15
142.26300.
183.13400.
220.33500.
253.13600.
281.58700.
306.69800.
328.44900.
348.111000.
365.261100.
380.331200.
393.301300.
405.851400.
418.401500.

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
159.41 ± 0.32341.55Waddington G., 1947GT
164.22 ± 0.33353.20
173.64 ± 0.35376.05
188.07 ± 0.38412.40
202.21 ± 0.40449.40

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, References, Notes

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-213.4 ± 0.96kJ/molCcbProsen and Rossini, 1945ALS
Quantity Value Units Method Reference Comment
Deltacliquid-4148.5 ± 0.88kJ/molCcbProsen and Rossini, 1945Corresponding «DELTA»fliquid = -213.3 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
liquid272.00J/mol*KN/ADouslin and Huffman, 1946DH
liquid272.5J/mol*KN/AKilpatrick and Pitzer, 1946DH
liquid269.4J/mol*KN/AStull, 1937Extrapolation below 90 K, 17.76 cal/mol*K.; DH

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
189.67298.15Ohnishi, Fujihara, et al., 1989DH
191.88298.15Costas, Huu, et al., 1988DH
191.88298.15Perez-Casas, Aicart, et al., 1988DH
189.44298.15Benson and D'Arcy, 1986DH
189.14298.15Aicart, Kumaran, et al., 1983DH
189.14298.15Benson, D'Arcy, et al., 1983DH
191.5300.Auerbach, Sage, et al., 1950T = 300 to 366 K. Cp given as 0.5312 Btu/lb*R at 80°F.; DH
188.74298.15Douslin and Huffman, 1946T = 13 to 300 K.; DH
186.9290.Kilpatrick and Pitzer, 1946T = 20 to 290 K.; DH
183.18298.1Stull, 1937T = 90 to 320 K.; DH

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, 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: 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 + 1-Butene, 3,3-dimethyl- = Butane, 2,2-dimethyl-

By formula: H2 + C6H12 = C6H14

Quantity Value Units Method Reference Comment
Deltar-125.8 ± 0.53kJ/molChydRogers, Crooks, et al., 1987liquid phase
Deltar-125.9 ± 0.63kJ/molChydDolliver, Gresham, et al., 1937gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -126.95 ± 0.63 kJ/mol; AT 355 °K

n-Hexane = Butane, 2,2-dimethyl-

By formula: C6H14 = C6H14

Quantity Value Units Method Reference Comment
Deltar-14.6 ± 0.75kJ/molCisoProsen and Rossini, 1941liquid phase; Calculated from «DELTA»Hc

Butane, 2,2-dimethyl- = Hydrogen + 1-Butene, 3,3-dimethyl-

By formula: C6H14 = H2 + C6H12

Quantity Value Units Method Reference Comment
Deltar125.9 ± 0.8kJ/molCmKennedy, Shomate, et al., 1938liquid phase

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes

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

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]

Kilpatrick J.E., 1946
Kilpatrick J.E., The thermodynamics of 2,2-dimethylbutane, including the heat capacity, heats of transition, fusion and vaporization and the entropy, J. Am. Chem. Soc., 1946, 68, 1066-1072. [all data]

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

Douslin D.R., 1946
Douslin D.R., Low-temperature thermal data on the five isomeric hexanes, J. Am. Chem. Soc., 1946, 68, 1704-1708. [all data]

Scott D.W., 1974, 2
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]

Pitzer K.S., 1946
Pitzer K.S., The entropies and related properties of branched paraffin hydrocarbons, Chem. Rev., 1946, 39, 435-447. [all data]

Waddington G., 1949
Waddington G., Experimental vapor heat capacities and heats of vaporization of 2-methylpentane, 3-methylpentane, and 2,3-dimethylbutane, J. Am. Chem. Soc., 1949, 71, 3902-3906. [all data]

Waddington G., 1947
Waddington G., Experimental vapor heat capacities and heats of vaporization of n-hexane and 2,2-dimethylbutane, J. Am. Chem. Soc., 1947, 69, 2275-2279. [all data]

Douslin and Huffman, 1946
Douslin, D.R.; Huffman, H.M., Low-temperature thermal data on the five isometric hexanes, J. Am. Chem. Soc., 1946, 68, 1704-1708. [all data]

Kilpatrick and Pitzer, 1946
Kilpatrick, J.E.; Pitzer, K.S., The thermodynamics of 2,2-dimethylbutane, including the heat capacity, heats of transitions, fusion and vaporization and the entropy, J. Am. Chem. Soc., 1946, 68, 1066-1072. [all data]

Stull, 1937
Stull, D.R., A semi-micro calorimeter for measuring heat capacities at low temperatures, J. Am. Chem. Soc., 1937, 59, 2726-2733. [all data]

Ohnishi, Fujihara, et al., 1989
Ohnishi, K.; Fujihara, I.; Murakami, S., Thermodynamic properties of decalins mixed with hexane isomers at 298.15K. 1. Excess enthalpies and excess isobaric heat capacities, Fluid Phase Equilib., 1989, 46, 59-72. [all data]

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]

Benson and D'Arcy, 1986
Benson, G.C.; D'Arcy, P.J., Heat capacities of binary mixtures of n-octane with each of the hexane isomers at 298.15 K, Can. J. Chem., 1986, 64, 2139-2141. [all data]

Aicart, Kumaran, et al., 1983
Aicart, E.; Kumaran, M.K.; Halpin, C.J.; Benson, G.C., Ultrasonic speeds and isentropic compressibilities of 2-methylpentan-1-ol with hexane isomers at 298.15 K, J. Chem. Thermodynam., 1983, 15, 1189-1197. [all data]

Benson, D'Arcy, et al., 1983
Benson, G.C.; D'Arcy, P.J.; Sugamori, M.E., Heat capacities of binary mixtures of 1-hexanol with hexane isomers at 298.15 K, Thermochim. Acta, 1983, 71, 161-166. [all data]

Auerbach, Sage, et al., 1950
Auerbach, C.E.; Sage, B.H.; Lacey, W.N., Isobaric heat capacities at bubble point, Ind. Eng. Chem., 1950, 42, 110-113. [all data]

Rogers, Crooks, et al., 1987
Rogers, D.W.; Crooks, E.; Dejroongruang, K., Enthalpies of hydrogenation of the hexenes, J. Chem. Thermodyn., 1987, 19, 1209-1215. [all data]

Dolliver, Gresham, et al., 1937
Dolliver, M.a.; Gresham, T.L.; Kistiakowsky, G.B.; Vaughan, W.E., Heats of organic reactions. V. Heats of hydrogenation of various hydrocarbons, J. Am. Chem. Soc., 1937, 59, 831-841. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Prosen and Rossini, 1941
Prosen, E.J.R.; Rossini, F.D., Heats of isomerization of the five hexanes, J. Res. NBS, 1941, 27, 289-310. [all data]

Kennedy, Shomate, et al., 1938
Kennedy, Wm.D.; Shomate, C.H.; Parks, G.P., Thermal data on organic compounds. XVIII. The heat capacity of and entropy of t-butylethylene, J. Am. Chem. Soc., 1938, 60, 1507-1509. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References