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Pyridine, 2,3-dimethyl-

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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
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil436.7KN/AWeast and Grasselli, 1989BS
Tboil434.4KN/AMajer and Svoboda, 1985 
Tboil433.6KN/AKyte, Jeffery, et al., 1960Uncertainty assigned by TRC = 1. K; TRC
Tboil433.4KN/AKyte, Jeffery, et al., 1960Uncertainty assigned by TRC = 0.5 K; TRC
Tboil430.75KN/AHackmann, Wibaut, et al., 1943Uncertainty assigned by TRC = 1. K; TRC
Quantity Value Units Method Reference Comment
Tfus258.35KN/AKyte, Jeffery, et al., 1960Uncertainty assigned by TRC = 0.3 K; TRC
Tfus257.93KN/ACoulson, Cox, et al., 1959Uncertainty assigned by TRC = 0.03 K; TRC
Quantity Value Units Method Reference Comment
Ttriple258.57KN/AChirico, Hossenlopp, et al., 1994Uncertainty assigned by TRC = 0.01 K; TRC
Quantity Value Units Method Reference Comment
Tc655.4KN/AMajer and Svoboda, 1985 
Tc655.45KN/AAmbrose, Cox, et al., 1960Uncertainty assigned by TRC = 0.3 K; vis, PRT, IPTS-48, with decomp.; TRC
Tc655.45KN/ACox, 1960Uncertainty assigned by TRC = 1. K; measured by R. Townsend to be pub. later; TRC
Quantity Value Units Method Reference Comment
Deltavap47.74kJ/molN/AMajer and Svoboda, 1985 
Deltavap52.0 ± 0.6kJ/molGSVerevkin, 1999Based on data from 283. - 313. K.; AC
Deltavap47.6kJ/molCGCChickos, Hosseini, et al., 1995Based on data from 323. - 373. K.; AC
Deltavap48.95kJ/molVCox, 1960ALS

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
39.08434.4N/AMajer and Svoboda, 1985 
45.2340.EBSteele, Chirico, et al., 1995Based on data from 328. - 476. K.; AC
42.7380.EBSteele, Chirico, et al., 1995Based on data from 328. - 476. K.; AC
40.2420.EBSteele, Chirico, et al., 1995Based on data from 328. - 476. K.; AC
37.4460.EBSteele, Chirico, et al., 1995Based on data from 328. - 476. K.; AC
43.0387.AStephenson and Malanowski, 1987Based on data from 372. - 436. K. See also Kkykj and Repas, 1973.; AC
46.9313.CMajer, Svoboda, et al., 1985AC
45.0343.CMajer, Svoboda, et al., 1985AC
43.5368.CMajer, Svoboda, et al., 1985AC

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
313. - 368.64.960.2902655.4Majer and Svoboda, 1985 

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
13.48258.6Chirico, Hossenlopp, et al., 1994, 2AC

Temperature of phase transition

Ttrs (K) Initial Phase Final Phase Reference Comment
47.350crystaline, IIcrystaline, ISteele, Chirico, et al., 1986DH
258.565crystaline, IliquidSteele, Chirico, et al., 1986DH

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.

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]

Kyte, Jeffery, et al., 1960
Kyte, C.T.; Jeffery, G.H.; Vogel, A.I., Physical Properties and Chem. Constitution XXVII. Pyridine Derivatives, J. Chem. Soc., 1960, 1960, 4454. [all data]

Hackmann, Wibaut, et al., 1943
Hackmann, J.Th.; Wibaut, J.P.; Gitsels, H.P.L., Basic N compounds from cracked distillates of California petroleum, Recl. Trav. Chim. Pays-Bas, 1943, 62, 229. [all data]

Coulson, Cox, et al., 1959
Coulson, E.A.; Cox, J.D.; Herington, E.F.G.; Martin, J.F., The Preparation and Physical Properties of the Pure Lutidines, J. Chem. Soc., 1959, 1959, 1934. [all data]

Chirico, Hossenlopp, et al., 1994
Chirico, R.D.; Hossenlopp, I.A.; Gammon, B.E.; Knipmeyer, S.E.; Steele, W.V., Heat capacities of the six dimethylpyridines between the temperatures 10 K and 445 K and methyl-group rotational barriers in the solid state a,b, J. Chem. Thermodyn., 1994, 26, 11, 1187, https://doi.org/10.1006/jcht.1994.1138 . [all data]

Ambrose, Cox, et al., 1960
Ambrose, D.; Cox, J.D.; Townsend, R., The critical temperatures of forty organic compounds, Trans. Faraday Soc., 1960, 56, 1452. [all data]

Cox, 1960
Cox, J.D., The second virial coefficients, latent heats of vaporization and heats of formation of the lutidines, Trans. Faraday Soc., 1960, 56, 959. [all data]

Verevkin, 1999
Verevkin, Sergey P., Strain Effects in Phenyl-Substituted Methanes. Geminal Interaction between Phenyl and the Electron-Releasing Substituent in Benzylamines and Benzyl Alcohols, J. Chem. Eng. Data, 1999, 44, 6, 1245-1251, https://doi.org/10.1021/je990118z . [all data]

Chickos, Hosseini, et al., 1995
Chickos, James S.; Hosseini, Sarah; Hesse, Donald G., Determination of vaporization enthalpies of simple organic molecules by correlations of changes in gas chromatographic net retention times, Thermochimica Acta, 1995, 249, 41-62, https://doi.org/10.1016/0040-6031(95)90670-3 . [all data]

Steele, Chirico, et al., 1995
Steele, W.V.; Chirico, R.D.; Nguyen, A.; Knipmeyer, S.E., Vapor pressures, high-temperature heat capacities, critical properties, derived thermodynamic functions, and barriers to methyl-group rotation, for the six dimethylpyridines, The Journal of Chemical Thermodynamics, 1995, 27, 3, 311-334, https://doi.org/10.1006/jcht.1995.0030 . [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]

Kkykj and Repas, 1973
Kkykj, J.; Repas, M., Petrochemia, 1973, 13, 179. [all data]

Majer, Svoboda, et al., 1985
Majer, V.; Svoboda, V.; Lencka, M., Enthalpies of vaporization and cohesive energies of dimethylpyridines and trimethylpyridines, The Journal of Chemical Thermodynamics, 1985, 17, 4, 365-370, https://doi.org/10.1016/0021-9614(85)90133-8 . [all data]

Chirico, Hossenlopp, et al., 1994, 2
Chirico, R.D.; Hossenlopp, I.A.; Gammon, B.E.; Knipmeyer, S.E.; Steele, W.V., Heat capacities of the six dimethylpyridines between the temperatures 10 K and 445 K and methyl-group rotational barriers in the solid state a,b, The Journal of Chemical Thermodynamics, 1994, 26, 11, 1187-1218, https://doi.org/10.1006/jcht.1994.1138 . [all data]

Steele, Chirico, et al., 1986
Steele, W.V.; Chirico, R.D.; Collier, W.B.; Hossenlopp, I.A.; Nguyen, A.; Strube, M.M., Thermochemical and thermophysical properties of organic nitrogen compounds found in fossil materials, NIPER Report, 1986, 188, 112p. [all data]


Notes

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