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

Pyridine, 2-methyl-

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.


Phase change data

Go To: Top, 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:
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.
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil402. ± 1.KAVGN/AAverage of 36 out of 37 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus206. ± 3.KAVGN/AAverage of 13 values; Individual data points
Quantity Value Units Method Reference Comment
Ttriple206.46KN/AScott, Hubbard, et al., 1963Uncertainty assigned by TRC = 0.05 K; by extrapolation of 1/f to 0.0; TRC
Ttriple206.44KN/AHelm, Lanum, et al., 1958Uncertainty assigned by TRC = 0.03 K; measured in calorimeter at USBM, Bartlesville, OK; TRC
Quantity Value Units Method Reference Comment
Tc621.KN/AMajer and Svoboda, 1985 
Tc621.1KN/AKobe and Mathews, 1970Uncertainty assigned by TRC = 1. K; TRC
Quantity Value Units Method Reference Comment
Pc45.40atmN/AKobe and Mathews, 1970Uncertainty assigned by TRC = 0.6000 atm; TRC
Quantity Value Units Method Reference Comment
rhoc2.99mol/lN/AKobe and Mathews, 1970Uncertainty assigned by TRC = 0.32 mol/l; TRC
Quantity Value Units Method Reference Comment
Deltavap10.2 ± 0.2kcal/molAVGN/AAverage of 8 values; Individual data points

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
8.645402.6N/AMajer and Svoboda, 1985 
9.85 ± 0.02320.EBChirico, Knipmeyer, et al., 1999Based on data from 308. - 441. K.; AC
9.27 ± 0.02360.EBChirico, Knipmeyer, et al., 1999Based on data from 308. - 441. K.; AC
8.70 ± 0.02400.EBChirico, Knipmeyer, et al., 1999Based on data from 308. - 441. K.; AC
8.05 ± 0.07440.EBChirico, Knipmeyer, et al., 1999Based on data from 308. - 441. K.; AC
10.0307.EBLencka, 1990Based on data from 292. - 403. K.; AC
11.2230.AStephenson and Malanowski, 1987Based on data from 209. - 245. K.; AC
8.72444.AStephenson and Malanowski, 1987Based on data from 429. - 537. K.; AC
8.46536.AStephenson and Malanowski, 1987Based on data from 521. - 621. K.; AC
9.35367.EB,IPStephenson and Malanowski, 1987Based on data from 352. - 445. K. See also Osborn and Douslin, 1968.; AC
9.35367.EBStephenson and Malanowski, 1987Based on data from 352. - 442. K. See also Rysselberghe and Fristrom, 1945.; AC
9.94 ± 0.02313.CMajer, Svoboda, et al., 1984AC
9.73 ± 0.02328.CMajer, Svoboda, et al., 1984AC
9.51 ± 0.02343.CMajer, Svoboda, et al., 1984AC
9.15 ± 0.02368.CMajer, Svoboda, et al., 1984AC
9.51352.MGHerington and Martin, 1953Based on data from 337. - 403. K.; AC
9.27 ± 0.02359.CRysselberghe and Fristrom, 1945AC
9.01 ± 0.02379.CRysselberghe and Fristrom, 1945AC
8.65 ± 0.02402.CRysselberghe and Fristrom, 1945AC

Enthalpy of vaporization

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

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) A (kcal/mol) beta Tc (K) Reference Comment
298. - 403.14.070.2879621.Majer and Svoboda, 1985 

Antoine Equation Parameters

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

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K) A B C Reference Comment
352.94 - 441.514.130421401.681-63.162Scott, Hubbard, et al., 1963, 2Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Reference Comment
2.3241206.45Scott, Hubbard, et al., 1963, 2DH
2.32206.5Domalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (cal/mol*K) Temperature (K) Reference Comment
11.26206.45Scott, Hubbard, et al., 1963, 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.

Scott, Hubbard, et al., 1963
Scott, D.W.; Hubbard, W.N.; Messerly, J.F.; Todd, S.S.; Hossenlopp, I.A.; Good, W.D.; Douslin, D.R.; McCullough, J.P., Chemical Thermodynamic Properties and Internal Rotation of Methylpyridines I. 2-Methylpyridine, J. Phys. Chem., 1963, 67, 680. [all data]

Helm, Lanum, et al., 1958
Helm, R.V.; Lanum, W.J.; Cook, G.L.; Ball, J.S., Purification and Properties of Pyrrole, Pyrrolidine, Pyridine and 2-Methylpyridine, J. Phys. Chem., 1958, 62, 858. [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]

Kobe and Mathews, 1970
Kobe, K.A.; Mathews, J.F., Critical Properties and Vapor Pressures of Some Organic Nitrogen and Oxygen Compounds, J. Chem. Eng. Data, 1970, 15, 182. [all data]

Chirico, Knipmeyer, et al., 1999
Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A.; Steele, W.V., Thermodynamic properties of the methylpyridines. Part 2. Vapor pressures, heat capacities, critical properties, derived thermodynamic functions between the temperatures 250 K and 560 K, and equilibrium isomer distributions for all temperatures >=250 K, The Journal of Chemical Thermodynamics, 1999, 31, 3, 339-378, https://doi.org/10.1006/jcht.1998.0451 . [all data]

Lencka, 1990
Lencka, Malgorzata, Measurements of the vapour pressures of pyridine, 2-methylpyridine, 2,4-dimethylpyridine, 2,6-dimethylpyridine, and 2,4,6-trimethylpyridine from 0.1 kPa to atmospheric pressure using a modified Swietoslawski ebulliometer, The Journal of Chemical Thermodynamics, 1990, 22, 5, 473-480, https://doi.org/10.1016/0021-9614(90)90139-H . [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, 1968
Osborn, Ann G.; Douslin, Donald R., Vapor pressure relations of 13 nitrogen compounds related to petroleum, J. Chem. Eng. Data, 1968, 13, 4, 534-537, https://doi.org/10.1021/je60039a024 . [all data]

Rysselberghe and Fristrom, 1945
Rysselberghe, Pierre Van; Fristrom, Robert M., The Conductance of Non-aqueous Solutions of Magnesium and Calcium Perchlorates 1, J. Am. Chem. Soc., 1945, 67, 4, 680-682, https://doi.org/10.1021/ja01220a053 . [all data]

Majer, Svoboda, et al., 1984
Majer, V.; Svoboda, V.; Lencka, M., Enthalpies of vaporization and cohesive energies of pyridine and isomeric methylpyridines, J. Chem. Thermodyn., 1984, 16, 1019-1024. [all data]

Herington and Martin, 1953
Herington, E.F.G.; Martin, J.F., Vapour pressures of pyridine and its homologues, Trans. Faraday Soc., 1953, 49, 154, https://doi.org/10.1039/tf9534900154 . [all data]

Scott, Hubbard, et al., 1963, 2
Scott, D.W.; Hubbard, W.N.; Messerly, J.F.; Todd, S.S.; Hossenlopp, I.A.; Good, W.D.; Douslin, D.R.; McCullough, J.P., Chemical thermodynamic properties and internal rotation of methylpyridines. I. 2-methylpyridine, J. Phys. Chem., 1963, 67, 680-685. [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]


Notes

Go To: Top, Phase change data, References