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2-Butanethiol, 2-methyl-

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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
DRB - Donald R. Burgess, Jr.
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil375.2KN/AAldrich Chemical Company Inc., 1990BS
Tboil372.7KN/AWeast and Grasselli, 1989BS
Tboil372.3KN/AMajer and Svoboda, 1985 
Tboil372.35KN/AMorris, Lanum, et al., 1960Uncertainty assigned by TRC = 0.2 K; TRC
Quantity Value Units Method Reference Comment
Ttriple169.3KN/AScott, Douslin, et al., 1962Crystal phase 1 phase; Uncertainty assigned by TRC = 0.2 K; by adiabatic calorimeter; TRC
Ttriple169.25KN/AMorris, Lanum, et al., 1960Uncertainty assigned by TRC = 0.2 K; meas. by Thermodynamics Lab., Bartlesville, OK; TRC
Quantity Value Units Method Reference Comment
Tc570.1KN/AMajer and Svoboda, 1985 
Quantity Value Units Method Reference Comment
Deltavap35.73kJ/molN/AMajer and Svoboda, 1985 
Deltavap35.6kJ/molN/AReid, 1972AC
Deltavap35.7kJ/molCScott, Douslin, et al., 1962, 2ALS
Deltavap35.7kJ/molN/AScott, Douslin, et al., 1962, 2DRB

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
31.37372.3N/AMajer and Svoboda, 1985 
36.3291.N/ADykyj, Svoboda, et al., 1999Based on data from 276. - 398. K.; AC
34.3335.A,EBStephenson and Malanowski, 1987Based on data from 320. - 411. K. See also Scott, Douslin, et al., 1962, 2.; AC
33.8 ± 0.1330.CScott, Douslin, et al., 1962, 2AC
32.7 ± 0.1350.CScott, Douslin, et al., 1962, 2AC
31.4 ± 0.1372.CScott, Douslin, et al., 1962, 2AC

Enthalpy of vaporization

ΔvapH = A exp(-βTr) (1 − Tr)β
    ΔvapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    Tr = reduced temperature (T / Tc)

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Temperature (K) A (kJ/mol) beta Tc (K) Reference Comment
330. - 372.51.20.2863570.1Majer and Svoboda, 1985 

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference
324.03 - 410.703.953271254.885-54.391Osborn and Douslin, 1966

Entropy of fusion

DeltafusS (J/mol*K) Temperature (K) Reference Comment
48.87144.5Messerly, Finke, et al., 1974CAL
4.15146.1

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
7.9793159.1crystaline, IIcrystaline, IScott, Douslin, et al., 1962, 2Lambda transition at about 145 K.; DH
0.6084169.3crystaline, IliquidScott, Douslin, et al., 1962, 2DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
50.15159.1crystaline, IIcrystaline, IScott, Douslin, et al., 1962, 2Lambda; DH
3.59169.3crystaline, IliquidScott, Douslin, et al., 1962, 2DH

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:


References

Go To: Top, Phase change data, Notes

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

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [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]

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]

Morris, Lanum, et al., 1960
Morris, J.C.; Lanum, W.J.; Helm, R.V.; Haines, W.E.; Cook, G.L.; Ball, J.S., Purification and Properties of Ten Organic Sulfur Compounds, J. Chem. Eng. Data, 1960, 5, 112-6. [all data]

Scott, Douslin, et al., 1962
Scott, D.W.; Douslin, D.R.; Finke, H.L.; Hubbard, W.N.; Messerly, J.F.; Hossenlopp, I.A.; McCullough, J.P., 2-Methyl-2-Butanethiol: Chemical thermodynamic properties and rotational isomerism., J. Phys. Chem., 1962, 66, 1334-41. [all data]

Reid, 1972
Reid, Robert C., Handbook on vapor pressure and heats of vaporization of hydrocarbons and related compounds, R. C. Wilhort and B. J. Zwolinski, Texas A Research Foundation. College Station, Texas(1971). 329 pages.$10.00, AIChE J., 1972, 18, 6, 1278-1278, https://doi.org/10.1002/aic.690180637 . [all data]

Scott, Douslin, et al., 1962, 2
Scott, D.W.; Douslin, D.R.; Finke, H.L.; Hubbard, W.N.; Messerly, J.F.; Hossenlopp, I.A.; McCullough, J.P., 2-Methyl-2-butanethiol: Chemical thermodynamic properties and rotational isomerism, J. Phys. Chem., 1962, 66, 1334-1341. [all data]

Dykyj, Svoboda, et al., 1999
Dykyj, J.; Svoboda, J.; Wilhoit, R.C.; Frenkel, M.L.; Hall, K.R., Vapor Pressure of Chemicals: Part A. Vapor Pressure and Antoine Constants for Hydrocarbons and Sulfur, Selenium, Tellurium and Hydrogen Containing Organic Compounds, Springer, Berlin, 1999, 373. [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]

Osborn and Douslin, 1966
Osborn, A.G.; Douslin, D.R., Vapor Pressure Relations of 36 Sulfur Compounds Present in Petroleum., J. Chem. Eng. Data, 1966, 11, 4, 502-509, https://doi.org/10.1021/je60031a014 . [all data]

Messerly, Finke, et al., 1974
Messerly, J.F.; Finke, H.L.; Todd, S.S., Low-temperature thermal studies on six organo-sulfur compounds, J. Chem. Thermodyn., 1974, 6, 7, 635, https://doi.org/10.1016/0021-9614(74)90115-3 . [all data]


Notes

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